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HumanDevelopmentEmbryo to Newborn
Human DevelopmentGSE: Humans are similar to many speciesin many ways, yet unique among Earth’slife forms.Let us examine th...
First Trimester           (months 1 - 3)1 month: Your baby is an embryo consisting oftwo layers of cells from which all he...
First Trimester           (months 1 - 3)1 month: Your baby is an embryo consisting oftwo layers of cells from which all he...
2 nd Trimester           (months 4 - 6)Month 4: Your baby is now about 5 inches longand weighs 5 ounces. His skeleton is s...
2 nd Trimester           (months 4 - 6)Month 4: Your baby is now about 5 inches longand weighs 5 ounces. His skeleton is s...
3 rd Trimester           (months 7 - 9)Month 7: By now, your baby weighs about 3pounds and is more than 15 inches long. Sh...
3 rd Trimester           (months 7 - 9)Month 7: By now, your baby weighs about 3pounds and is more than 15 inches long. Sh...
Comparative Embryology     Let’s compare and contrast human  development to the development of other                   ani...
Comparative Embryology Compare and Contrast human development to the            development of other animalsAfter the laye...
Human+development pvms[1]
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Transcript of "Human+development pvms[1]"

  1. 1. HumanDevelopmentEmbryo to Newborn
  2. 2. Human DevelopmentGSE: Humans are similar to many speciesin many ways, yet unique among Earth’slife forms.Let us examine the major changes thatoccur in human development from a singlecell to birth
  3. 3. First Trimester (months 1 - 3)1 month: Your baby is an embryo consisting oftwo layers of cells from which all her organs andbody parts will develop.2 months: Your baby is now about the size of akidney bean and is constantly moving. He hasdistinct, slightly webbed fingers.3 months: By now your baby is about 3 incheslong and weighs nearly an ounce. Her tiny,unique fingerprints are now in place
  4. 4. First Trimester (months 1 - 3)1 month: Your baby is an embryo consisting oftwo layers of cells from which all her organs andbody parts will develop.2 months: Your baby is now about the size of akidney bean and is constantly moving. He hasdistinct, slightly webbed fingers.3 months: By now your baby is about 3 incheslong and weighs nearly an ounce. Her tiny,unique fingerprints are now in place
  5. 5. 2 nd Trimester (months 4 - 6)Month 4: Your baby is now about 5 inches longand weighs 5 ounces. His skeleton is starting toharden from rubbery cartilage to bone.Month 5: Eyebrows and eyelids are now in place.Your baby would now be more than 10 inches longif you stretched out her legs.Month 6: Your baby weighs about a pound and ahalf. His wrinkled skin is starting to smooth outas he puts on baby fat.
  6. 6. 2 nd Trimester (months 4 - 6)Month 4: Your baby is now about 5 inches longand weighs 5 ounces. His skeleton is starting toharden from rubbery cartilage to bone.Month 5: Eyebrows and eyelids are now in place.Your baby would now be more than 10 inches longif you stretched out her legs.Month 6: Your baby weighs about a pound and ahalf. His wrinkled skin is starting to smooth outas he puts on baby fat.
  7. 7. 3 rd Trimester (months 7 - 9)Month 7: By now, your baby weighs about 3pounds and is more than 15 inches long. She canopen and close her eyes and follow a light.Month 8: Your baby now weighs about 4 3/4pounds. His layers of fat are filling him out,making him rounder, and his lungs are welldeveloped.Month 9: The average baby is more than 19inches long and weighs nearly 7 pounds now, butbabies vary widely in size at this stage
  8. 8. 3 rd Trimester (months 7 - 9)Month 7: By now, your baby weighs about 3pounds and is more than 15 inches long. She canopen and close her eyes and follow a light.Month 8: Your baby now weighs about 4 3/4pounds. His layers of fat are filling him out,making him rounder, and his lungs are welldeveloped.Month 9: The average baby is more than 19inches long and weighs nearly 7 pounds now, butbabies vary widely in size at this stage
  9. 9. Comparative Embryology Let’s compare and contrast human development to the development of other animalsThe earliest phase of embryonicdevelopment is when the fertilized eggundergoes rapid cell divisionAfter early cell division, the embryoseparates into three layers, which willbecome all of the parts of the animalsbody.
  10. 10. Comparative Embryology Compare and Contrast human development to the development of other animalsAfter the layers have completely formed, theembryo starts developing organs. Often organswill grow and then disappear, such as the tail of ahuman embryo. Also, animals will differ in termsof what organs they will form because not allanimals have the same structures. Some, forinstance, will develop wings.The beginnings of embryonic development mayoccur inside the mothers body or in eggs whichshe has laid outside her body to be fertilized,depending on the species. Embryonic developmentends when the organism transforms into a fetusor larvae, after the basic organs are formed.All embryonic development is controlled by genes
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