The
Reproductive
System
• Reproduction is the process that continues life on
earth
• Males and females each have structures
specialized for their ...
• The male reproductive system consists of both
external and internal organs
• The main external (outside the body) organs...
• Each sperm consists of a head and a tail; the head
contains hereditary information and the tail moves it
• Semen is the ...
• The internal parts of the male reproductive
system include:
• vas deferens, a long, muscular tube that travels
from the ...
• Female reproductive organs are internal
• Ovaries are the female reproductive organs that
produce eggs, the female sex c...
• Ovulation is a process in which an egg is released,
about once every month. The two ovaries release
eggs on alternating ...
• The uterus is a muscular organ with thick,
protective walls
• A fertilized egg develops in the uterus (aka womb)
• Ferti...
• The cervix is the lower end of the uterus; it is
directly connected to the birth canal (vagina)
• It is through the birt...
• The menstrual cycle is the monthly cycle of
changes in the female reproductive system.
• This cycle is controlled by hor...
• Ovulation occurs about 14 days before
menstruation begins; once an egg is released, it
must be fertilized within 24 hour...
• The average age at which menstrual cycles begin is
12 or 13 years, though this can vary widely.
• The cycle continues un...
Reproductive system science7
Reproductive system science7
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Reproductive system science7

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Reproductive system science7

  1. 1. The Reproductive System
  2. 2. • Reproduction is the process that continues life on earth • Males and females each have structures specialized for their roles in reproduction
  3. 3. • The male reproductive system consists of both external and internal organs • The main external (outside the body) organs are the penis and the scrotum • The scrotum contains the testes, which produce the hormone testosterone • The testes also produce male reproductive cells called sperm
  4. 4. • Each sperm consists of a head and a tail; the head contains hereditary information and the tail moves it • Semen is the mixture of sperm and fluid that helps move reproductive cells through the urethra and out of the body
  5. 5. • The internal parts of the male reproductive system include: • vas deferens, a long, muscular tube that travels from the epididymis (a long tube that rests on the back of each testicle) into the pelvic cavity. • The vas deferens transports mature sperm to the urethra
  6. 6. • Female reproductive organs are internal • Ovaries are the female reproductive organs that produce eggs, the female sex cells - When a female is born, she already has all the cells that will become eggs
  7. 7. • Ovulation is a process in which an egg is released, about once every month. The two ovaries release eggs on alternating months
  8. 8. • The uterus is a muscular organ with thick, protective walls • A fertilized egg develops in the uterus (aka womb) • Fertilization is the joining of egg and sperm
  9. 9. • The cervix is the lower end of the uterus; it is directly connected to the birth canal (vagina) • It is through the birth canal that a baby travels from the womb to the outside world.
  10. 10. • The menstrual cycle is the monthly cycle of changes in the female reproductive system. • This cycle is controlled by hormones, which begin by developing eggs in the ovary. • Hormones also cause the lining of the uterus to become thicker, in preparation for the possibility of protecting and nourishing a baby
  11. 11. • Ovulation occurs about 14 days before menstruation begins; once an egg is released, it must be fertilized within 24 hours or it begins to break down • If the egg is not fertilized, the lining of the uterus breaks down. Blood and tissue cells are released in menstrual flow. • The entire menstrual cycle averages 28 days, though this can vary
  12. 12. • The average age at which menstrual cycles begin is 12 or 13 years, though this can vary widely. • The cycle continues until around age 50 or 51 (again, this varies). (these years between are called a woman’s reproductive years) • Menopause occurs when both ovulation and menstrual periods end • In years right before menopause, hormone production begins to shut down and changes in the cycle occur. This time is called perimenopause

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