Embryonic development homework
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This document provides an embryonic development homework with blanks to be filled in. It covers topics like: 1) Sex is determined at conception when the ovum and sperm unite. 2) The process in plants is called fertilization. 3) In humans, when the sperm enters the ovum, it is also called fertilization. 4) An organism is formed from the union of male and female sex cells.
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Human+development pvms[1]![Human+development pvms[1]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
The document summarizes human development from embryo to newborn in three months stages. In the first trimester, the embryo develops from a single cell into a structure with distinct organs and fingerprints. In the second trimester, the fetus grows bones and skin, and develops features like eyebrows. In the third trimester, the fetus continues growing, developing lungs and fat layers, until birth when the average baby is over 19 inches and 7 pounds. The document also briefly compares human development to other animals, noting early cell division and formation of body layers are shared across species.
Human+development pvms
Human development from embryo to newborn occurs in three stages: the first, second, and third trimesters. In the first trimester, the embryo develops organs and body parts from two cell layers and fingerprints form. In the second trimester, the skeleton hardens and skin smoothes as fat develops. In the third trimester, organs continue maturing and the baby gains weight and length until birth. Comparative embryology shows that while human development is similar to other animals initially, differences emerge as organs form depending on the species' structures. Embryonic development ends when basic organs form and the fetus or larvae develops, either inside or outside the mother depending on species.
Human+development pvms
Human development from embryo to newborn occurs in three stages: the first, second, and third trimesters. In the first trimester, the embryo develops organs and body parts from two cell layers and fingerprints form. In the second trimester, the skeleton hardens and skin smoothes out. In the third trimester, organs continue developing and the baby gains weight and length. Comparative embryology shows that while human development is similar to other animals in its cell division and layer formation, it differs in the specific organs developed and whether development occurs inside or outside the mother's body, depending on the species.
Pregnancy report
The glider's gestation period is 15-17 days, after which the baby follows a trail of saliva from the mother's uterus to her pouch. It will stay in the pouch for 8-10 weeks, nursing, before starting to venture out. After 14-17 days out of the pouch, its eyes will open. It will be fully weaned and eating solid food by 6-8 weeks out of the pouch.
Human Fetal Development
The document summarizes the key stages of human fetal development from conception through the three trimesters of pregnancy. In the first trimester, the placenta and umbilical cord begin to form and major organs start to develop. By the second trimester, the fetus grows significantly in size and all organs and structures have formed, though further maturation is still needed. In the third trimester, the fetus continues growing and maturing its organs and systems in preparation for birth.
Fetus
At 9 months, the fetus is fully developed and ready for birth. It is 19-20 inches long and weighs 7-7.5 pounds. The lungs are mature and the fetus can survive outside the womb. The skin is pink and smooth, and the fetus settles lower in preparation for birth.
Fetal development during pregnancy
1) The document describes the major stages of fetal development from conception through the full term pregnancy period.
2) It explains that at conception the fertilized egg attaches to the uterus and begins dividing rapidly, forming the basic structures of the body. By 6 weeks a heartbeat can be detected.
3) From weeks 11 to birth the fetus continues to develop and grow organs and tissues. Lungs are not fully mature until birth.
Pregnancy-Fetal development.ppt
The document provides information about pregnancy and fetal development from fertilization through the first, second, and third trimesters. It describes how the embryo implants in the uterus and develops organs and limbs over the course of weeks. The placenta and umbilical cord form to support the growth of the fetus and allow nutrient exchange with the mother. The fetus' movements begin at 9 weeks and its sex may be apparent at 11 weeks.
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Human+development pvms[1]
The document summarizes human development from embryo to newborn in three months stages. In the first trimester, the embryo develops from a single cell into a structure with distinct organs and fingerprints. In the second trimester, the fetus grows bones and skin, and develops features like eyebrows. In the third trimester, the fetus continues growing, developing lungs and fat layers, until birth when the average baby is over 19 inches and 7 pounds. The document also briefly compares human development to other animals, noting early cell division and formation of body layers are shared across species.
Human+development pvms
Human development from embryo to newborn occurs in three stages: the first, second, and third trimesters. In the first trimester, the embryo develops organs and body parts from two cell layers and fingerprints form. In the second trimester, the skeleton hardens and skin smoothes as fat develops. In the third trimester, organs continue maturing and the baby gains weight and length until birth. Comparative embryology shows that while human development is similar to other animals initially, differences emerge as organs form depending on the species' structures. Embryonic development ends when basic organs form and the fetus or larvae develops, either inside or outside the mother depending on species.
Human+development pvms
Human development from embryo to newborn occurs in three stages: the first, second, and third trimesters. In the first trimester, the embryo develops organs and body parts from two cell layers and fingerprints form. In the second trimester, the skeleton hardens and skin smoothes out. In the third trimester, organs continue developing and the baby gains weight and length. Comparative embryology shows that while human development is similar to other animals in its cell division and layer formation, it differs in the specific organs developed and whether development occurs inside or outside the mother's body, depending on the species.
Pregnancy report
The glider's gestation period is 15-17 days, after which the baby follows a trail of saliva from the mother's uterus to her pouch. It will stay in the pouch for 8-10 weeks, nursing, before starting to venture out. After 14-17 days out of the pouch, its eyes will open. It will be fully weaned and eating solid food by 6-8 weeks out of the pouch.
Human Fetal Development
The document summarizes the key stages of human fetal development from conception through the three trimesters of pregnancy. In the first trimester, the placenta and umbilical cord begin to form and major organs start to develop. By the second trimester, the fetus grows significantly in size and all organs and structures have formed, though further maturation is still needed. In the third trimester, the fetus continues growing and maturing its organs and systems in preparation for birth.
Fetus
At 9 months, the fetus is fully developed and ready for birth. It is 19-20 inches long and weighs 7-7.5 pounds. The lungs are mature and the fetus can survive outside the womb. The skin is pink and smooth, and the fetus settles lower in preparation for birth.
Fetal development during pregnancy
1) The document describes the major stages of fetal development from conception through the full term pregnancy period.
2) It explains that at conception the fertilized egg attaches to the uterus and begins dividing rapidly, forming the basic structures of the body. By 6 weeks a heartbeat can be detected.
3) From weeks 11 to birth the fetus continues to develop and grow organs and tissues. Lungs are not fully mature until birth.
Pregnancy-Fetal development.ppt
The document provides information about pregnancy and fetal development from fertilization through the first, second, and third trimesters. It describes how the embryo implants in the uterus and develops organs and limbs over the course of weeks. The placenta and umbilical cord form to support the growth of the fetus and allow nutrient exchange with the mother. The fetus' movements begin at 9 weeks and its sex may be apparent at 11 weeks.
SCIENCE 4_Q2_Mod4.pdf
Here are the stages of the life cycle of a chicken arranged in order:
1. Hen lays eggs
2. Hen sits on eggs to keep them warm
3. Chick grows inside the egg
4. Chick hatches from the egg
5. Chick grows into an adult chicken
B. Life Cycle of a Frog
1. Frog lays eggs in water
2. Eggs hatch into tadpoles
3. Tadpoles grow legs and lungs
4. Tadpoles transform into young frogs
5. Young frogs grow into adult frogs
Frogs lay eggs in large
clusters or strings in
ponds or other bodies of
water.
The eggs hatch into
t
developmental psychology
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theory, crying serves an important
communicative function for infants. Crying
signals the caregiver that something is wrong
and elicits a caregiving response. The three
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This document summarizes the stages of development from zygote to birth. It discusses the key developments that occur each week of gestation such as the heart beginning to beat in week 3 and all major organs being formed by week 8. It also covers the size and appearance of newborns, their sleep cycles, reflexes, and the different types of cries. The document provides a comprehensive overview of the major developmental milestones in utero and for
Presentation - Reproduction
Puberty is the stage of life when the reproductive organs start working and secondary sexual characteristics develop. During puberty, physical changes occur in both males and females as they transition into adulthood. These changes include growth of hair in new places, changes in voice and body size and shape, and the ability to reproduce. It is important for youth experiencing puberty to talk to trusted adults about the changes they are experiencing.
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The document discusses animal reproduction and development. It explains that fertilization occurs internally in reptiles and birds through the fusion of egg and sperm cells. Reptiles lay hard-shelled eggs on land, while most birds build nests and care for their eggs. Mammals give birth to live young, which develop internally after an egg is fertilized. The document also notes that eggs protect developing animals and provide nutrition until hatching or birth.
Living within the womb
The document describes the process of human reproduction and early fetal development from fertilization through the first few weeks of pregnancy. It explains that fertilization occurs when an egg and sperm join to form a zygote, which develops into a blastocyst and then implants in the uterus. The blastocyst becomes an embryo and a placenta begins to develop to nourish the growing fetus. During this period, defects can occur due to genetic factors or issues like alcohol or drug use. Physical development of the fetus accelerates in the third week as the hands, feet, fingers, toes, brain, lungs and eyelids form.
LS 2 7 The Reproductive System
1. Prenatal development involves several key stages from fertilization through birth. During the first three months, the embryo's head and brain develop rapidly while the body remains small. Eyes, ears, arms and legs begin to form.
2. In the second trimester, from 3-6 months, growth catches up with the head. Fetal heartbeats can be heard and the skeleton seen on x-rays. Babies begin kicking. By 6 months the fetus is about 30cm and 700g.
3. In the final trimester, nutrients are important for bone, blood and nerve development. By 9 months the fetus is about 45cm and 3,000g. Birth then occurs.
Developmental Psychology G1
The document discusses key concepts in developmental psychology including definitions of development, growth, and maturation. It outlines basic principles like development following an orderly sequence and being influenced by both nature and nurture. Specific prenatal development stages from fertilization to birth are described week by week. Milestones of sensory, motor, emotional, cognitive, and social development from infancy through childhood are also outlined.
Developmental Psychology G1
Developmental psychology involves the progressive changes that occur due to maturation and experience over time. Key concepts include development, growth, and maturation. Development follows an orderly sequence and rate of development varies between individuals. Early development is more critical than later stages. Both nature and nurture influence biological, emotional, cognitive, personal, and social development from prenatal stages through adulthood.
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The document provides an overview of a module on the human reproductive system, which contains 4 lessons that cover the male and female reproductive systems, fertilization and development from conception to birth, and some reproductive health issues. The module aims to familiarize students with the parts and functions of the reproductive systems as well as the process of human growth and development from embryo to birth. Students are expected to learn to identify reproductive system parts, describe their functions, explain the stages of the menstrual cycle and human development, and describe some reproductive technologies.
Biology m13 human reproductive system
The document provides an overview of a module on the human reproductive system, which contains 4 lessons that cover the male and female reproductive systems, fertilization and human development, and reproductive health issues. The module aims to familiarize students with the parts and functions of the reproductive systems as well as the process of human growth from fertilization through birth. It includes diagrams of the reproductive systems, descriptions of their parts and functions, and activities for students to complete.
Pregnancy
The fertilized egg moves down the fallopian tube and implants in the uterus. It grows into an embryo, then a fetus. The placenta links the fetus and uterus, allowing transfer of oxygen, food and waste while keeping the blood separate. After two months, the fetus is too big for the uterus wall and connects to the placenta via the umbilical cord. The process takes about 38 weeks until birth, controlled by hormones and resulting in contractions pushing the baby out through the cervix.
Nancy
The document summarizes fetal development from weeks 1-8 of pregnancy. In week 1, pregnancy is counted from the first day of the last menstrual period. In week 2, fertilization occurs in the fallopian tubes as the egg and sperm join. In week 3, the fertilized egg begins rapidly dividing and implants in the uterus. In weeks 4-5, the blastocyst attaches to the uterus and divides into the placenta and embryo, with major organs beginning to form. In weeks 6-7, the heart begins beating and arms and legs start to grow. In week 8, the embryo practices moving as muscles develop and facial features become visible.
Lectures Psychology.pptx
This document provides an overview of human development from prenatal stages through adolescence. It discusses physical, cognitive, and psychosocial development at each life stage. Some key points include:
- Prenatal development occurs in three stages: germinal, embryonic, and fetal. During these stages the zygote develops into a fetus through cell division and organ formation.
- Infancy is a time of rapid physical growth and development of motor skills. Important milestones include attachment formation and developing a self-concept.
- Puberty begins adolescence and is marked by physical sexual maturation. Cognitive abilities become more advanced and identity formation is a key task. Peer relationships gain importance.
- Each developmental period involves
PRENTAL DEVELOPMENT PPT_20240117_235400_0000.pdf
The document summarizes the key stages of prenatal development from conception through birth in 3 months. During the first month, the zygote forms and begins cell division. In the second month, the embryo develops organs and the placenta forms. The third month sees further development of features and organs. The fetal period in months 4-9 sees continued growth and maturation of all body systems. By the end of the 9 months, birth occurs and development is complete.
Puberty and Adolescence Stage
1. The document outlines a lesson plan on puberty and adolescence. It reviews reproductive systems, discusses physical and emotional changes during puberty through group activities, and assesses student understanding.
2. Examples of physical changes discussed include growth spurts, body hair development, breast growth, and menstruation. Emotional changes like mood swings are also addressed.
3. Creative activities are used to demonstrate changes, such as students acting out puberty scenarios, writing poems, or illustrating physical changes. Group presentations and discussions reinforce lesson concepts.
Pregnancy and childbirth
The document discusses the stages of pregnancy and childbirth. It describes how an embryo develops into a fetus over the course of pregnancy. During the embryo stage from weeks 1-8, major organs begin to form. From weeks 9-birth, it is called a fetus and continues to grow and develop fully formed features. Childbirth occurs when contractions push the baby through the birth canal. The placenta and amniotic sac provide nutrients and protection for the growing fetus.
Development of the_foetus (2)
Fertilization occurs when a sperm joins with an egg in the fallopian tube to form a zygote, which is no larger than the head of a pin. Over the following weeks, the embryo develops major organs and the ability to move as it floats down to the uterus. By week 8, the embryo has transitioned to a fetus, which continues growing and developing through the stages of pregnancy. By week 20, the fetus is covered in vernix, practicing breathing, and making active movements. In the final weeks of pregnancy, the fetus gains fat stores, sleeps most of the day, and has a high chance of survival if born.
Foetal development
Fertilization occurs when a sperm and egg join in the fallopian tube to form a unique human being. Within 30 hours this fertilized egg, called a zygote, begins rapidly dividing as it floats down the fallopian tube towards the uterus. By week 3-5 the embryo's heart begins beating and major organs start to form, while the placenta provides nourishment. By week 7 the embryo has its own blood type and visible features like hair follicles, and by weeks 8-12 it is known as a fetus and can move inside the amniotic sac. The brain is fully developed by weeks 13-16 and the fetus can feel pain and make movements.
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Natural selection
Darwin proposed the theory of natural selection to explain evolution. Natural selection is the process by which organisms better adapted to their environment are more likely to survive and reproduce, passing on favorable traits. Darwin identified key components of natural selection: overproduction of offspring, variation among individuals, and competition for limited resources. Those individuals possessing variations that increase chances of survival will be selected through surviving and reproducing, passing on their beneficial traits. Over many generations, this process can lead to changes in a species.
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SCIENCE 4_Q2_Mod4.pdf
Here are the stages of the life cycle of a chicken arranged in order:
1. Hen lays eggs
2. Hen sits on eggs to keep them warm
3. Chick grows inside the egg
4. Chick hatches from the egg
5. Chick grows into an adult chicken
B. Life Cycle of a Frog
1. Frog lays eggs in water
2. Eggs hatch into tadpoles
3. Tadpoles grow legs and lungs
4. Tadpoles transform into young frogs
5. Young frogs grow into adult frogs
Frogs lay eggs in large
clusters or strings in
ponds or other bodies of
water.
The eggs hatch into
t
developmental psychology
Ainsworth in the 1960s. According to this
theory, crying serves an important
communicative function for infants. Crying
signals the caregiver that something is wrong
and elicits a caregiving response. The three
main infant cries are:
This document summarizes the stages of development from zygote to birth. It discusses the key developments that occur each week of gestation such as the heart beginning to beat in week 3 and all major organs being formed by week 8. It also covers the size and appearance of newborns, their sleep cycles, reflexes, and the different types of cries. The document provides a comprehensive overview of the major developmental milestones in utero and for
Presentation - Reproduction
Puberty is the stage of life when the reproductive organs start working and secondary sexual characteristics develop. During puberty, physical changes occur in both males and females as they transition into adulthood. These changes include growth of hair in new places, changes in voice and body size and shape, and the ability to reproduce. It is important for youth experiencing puberty to talk to trusted adults about the changes they are experiencing.
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The document discusses animal reproduction and development. It explains that fertilization occurs internally in reptiles and birds through the fusion of egg and sperm cells. Reptiles lay hard-shelled eggs on land, while most birds build nests and care for their eggs. Mammals give birth to live young, which develop internally after an egg is fertilized. The document also notes that eggs protect developing animals and provide nutrition until hatching or birth.
Living within the womb
The document describes the process of human reproduction and early fetal development from fertilization through the first few weeks of pregnancy. It explains that fertilization occurs when an egg and sperm join to form a zygote, which develops into a blastocyst and then implants in the uterus. The blastocyst becomes an embryo and a placenta begins to develop to nourish the growing fetus. During this period, defects can occur due to genetic factors or issues like alcohol or drug use. Physical development of the fetus accelerates in the third week as the hands, feet, fingers, toes, brain, lungs and eyelids form.
LS 2 7 The Reproductive System
1. Prenatal development involves several key stages from fertilization through birth. During the first three months, the embryo's head and brain develop rapidly while the body remains small. Eyes, ears, arms and legs begin to form.
2. In the second trimester, from 3-6 months, growth catches up with the head. Fetal heartbeats can be heard and the skeleton seen on x-rays. Babies begin kicking. By 6 months the fetus is about 30cm and 700g.
3. In the final trimester, nutrients are important for bone, blood and nerve development. By 9 months the fetus is about 45cm and 3,000g. Birth then occurs.
Developmental Psychology G1
The document discusses key concepts in developmental psychology including definitions of development, growth, and maturation. It outlines basic principles like development following an orderly sequence and being influenced by both nature and nurture. Specific prenatal development stages from fertilization to birth are described week by week. Milestones of sensory, motor, emotional, cognitive, and social development from infancy through childhood are also outlined.
Developmental Psychology G1
Developmental psychology involves the progressive changes that occur due to maturation and experience over time. Key concepts include development, growth, and maturation. Development follows an orderly sequence and rate of development varies between individuals. Early development is more critical than later stages. Both nature and nurture influence biological, emotional, cognitive, personal, and social development from prenatal stages through adulthood.
Biology m13 human reproductive system
The document provides an overview of a module on the human reproductive system, which contains 4 lessons that cover the male and female reproductive systems, fertilization and development from conception to birth, and some reproductive health issues. The module aims to familiarize students with the parts and functions of the reproductive systems as well as the process of human growth and development from embryo to birth. Students are expected to learn to identify reproductive system parts, describe their functions, explain the stages of the menstrual cycle and human development, and describe some reproductive technologies.
Biology m13 human reproductive system
The document provides an overview of a module on the human reproductive system, which contains 4 lessons that cover the male and female reproductive systems, fertilization and human development, and reproductive health issues. The module aims to familiarize students with the parts and functions of the reproductive systems as well as the process of human growth from fertilization through birth. It includes diagrams of the reproductive systems, descriptions of their parts and functions, and activities for students to complete.
Pregnancy
The fertilized egg moves down the fallopian tube and implants in the uterus. It grows into an embryo, then a fetus. The placenta links the fetus and uterus, allowing transfer of oxygen, food and waste while keeping the blood separate. After two months, the fetus is too big for the uterus wall and connects to the placenta via the umbilical cord. The process takes about 38 weeks until birth, controlled by hormones and resulting in contractions pushing the baby out through the cervix.
Nancy
The document summarizes fetal development from weeks 1-8 of pregnancy. In week 1, pregnancy is counted from the first day of the last menstrual period. In week 2, fertilization occurs in the fallopian tubes as the egg and sperm join. In week 3, the fertilized egg begins rapidly dividing and implants in the uterus. In weeks 4-5, the blastocyst attaches to the uterus and divides into the placenta and embryo, with major organs beginning to form. In weeks 6-7, the heart begins beating and arms and legs start to grow. In week 8, the embryo practices moving as muscles develop and facial features become visible.
Lectures Psychology.pptx
This document provides an overview of human development from prenatal stages through adolescence. It discusses physical, cognitive, and psychosocial development at each life stage. Some key points include:
- Prenatal development occurs in three stages: germinal, embryonic, and fetal. During these stages the zygote develops into a fetus through cell division and organ formation.
- Infancy is a time of rapid physical growth and development of motor skills. Important milestones include attachment formation and developing a self-concept.
- Puberty begins adolescence and is marked by physical sexual maturation. Cognitive abilities become more advanced and identity formation is a key task. Peer relationships gain importance.
- Each developmental period involves
PRENTAL DEVELOPMENT PPT_20240117_235400_0000.pdf
The document summarizes the key stages of prenatal development from conception through birth in 3 months. During the first month, the zygote forms and begins cell division. In the second month, the embryo develops organs and the placenta forms. The third month sees further development of features and organs. The fetal period in months 4-9 sees continued growth and maturation of all body systems. By the end of the 9 months, birth occurs and development is complete.
Puberty and Adolescence Stage
1. The document outlines a lesson plan on puberty and adolescence. It reviews reproductive systems, discusses physical and emotional changes during puberty through group activities, and assesses student understanding.
2. Examples of physical changes discussed include growth spurts, body hair development, breast growth, and menstruation. Emotional changes like mood swings are also addressed.
3. Creative activities are used to demonstrate changes, such as students acting out puberty scenarios, writing poems, or illustrating physical changes. Group presentations and discussions reinforce lesson concepts.
Pregnancy and childbirth
The document discusses the stages of pregnancy and childbirth. It describes how an embryo develops into a fetus over the course of pregnancy. During the embryo stage from weeks 1-8, major organs begin to form. From weeks 9-birth, it is called a fetus and continues to grow and develop fully formed features. Childbirth occurs when contractions push the baby through the birth canal. The placenta and amniotic sac provide nutrients and protection for the growing fetus.
Development of the_foetus (2)
Fertilization occurs when a sperm joins with an egg in the fallopian tube to form a zygote, which is no larger than the head of a pin. Over the following weeks, the embryo develops major organs and the ability to move as it floats down to the uterus. By week 8, the embryo has transitioned to a fetus, which continues growing and developing through the stages of pregnancy. By week 20, the fetus is covered in vernix, practicing breathing, and making active movements. In the final weeks of pregnancy, the fetus gains fat stores, sleeps most of the day, and has a high chance of survival if born.
Foetal development
Fertilization occurs when a sperm and egg join in the fallopian tube to form a unique human being. Within 30 hours this fertilized egg, called a zygote, begins rapidly dividing as it floats down the fallopian tube towards the uterus. By week 3-5 the embryo's heart begins beating and major organs start to form, while the placenta provides nourishment. By week 7 the embryo has its own blood type and visible features like hair follicles, and by weeks 8-12 it is known as a fetus and can move inside the amniotic sac. The brain is fully developed by weeks 13-16 and the fetus can feel pain and make movements.
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The document discusses the development of a fetus from conception to birth over a period of 9 months. It describes the major developmental milestones that occur each month, such as the heartbeat starting at 3 weeks, fingernails forming at 9 weeks, and lungs developing enough for the fetus to survive outside the womb starting at 24 weeks. The purpose is to inform about prenatal development and the humanity of the fetus from conception.
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Darwin proposed the theory of natural selection to explain evolution. Natural selection is the process by which organisms better adapted to their environment are more likely to survive and reproduce, passing on their favorable traits. Darwin identified three factors that influence natural selection: overproduction of offspring, variation among individuals, and competition for limited resources. Those individuals possessing variations that increase their chances of survival will be selected through this process to pass on their genes over many generations.
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Darwin proposed the theory of natural selection to explain evolution. Natural selection is the process by which organisms better adapted to their environment are more likely to survive and reproduce, passing on their favorable traits. Darwin identified three factors that influence natural selection: overproduction of offspring, variation among individuals, and competition for limited resources. Those individuals possessing variations that increase their chances of survival will be selected through this process to pass on their genes over many generations.
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The document defines key terms used in embryonic development: zygote refers to the single cell formed from the union of an ovum and sperm; embryo describes an organism in early development before distinct features form; fetus is used once major organs are present, around the 8th week in humans; fertilization is the union of sex cells during reproduction, called insemination in humans.
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Embryonic development homework
- 1. Embryonic Development Homework: Fill in the blanks 1. The sex of a child is determined at _________________________________________, when ovum and sperm unite. 2. In plants, this process happens between ovum and pollen and is called ________________________________________. 3. In humans, this process when sperm enters ovum, is also called _______________________________________. 4. A __________________________ is the cell formed from the union of a male and female sex cell. 5. An embryo becomes a fetus at __________ weeks of development, when all major organs are present. 6. A _____________________ is the young, unborn vertebrate with a basic structural resemblance to its adult form. 7. The ____________________ is the organism in its earliest stages of development, before it has reached a recognizable form. 8. In what part of a woman’s body does the fetus grow?___________________________ 9. In what month do eyelids close and not re-open until week 28? 10. In what month can the fetus begin to suck its thumb and its fingernails form?? 11. In what month can hands and feet be distinguished? 12. At what age will a premature fetus be likely to survive? Why? What organ needs to be fully developed? 13. At what weight will a newborn usually be allowed to go home? Why do you think this is so?