Reproductive System

• The average length of a menstrual cycle is 28

  days. However, it varies greatly among women

  (ranging from 21 to 35 days).
• The young egg in the ovary begins to mature. Estrogen is

  secreted by the ovary. Uterus thickens to prepare for the

  attachment of fertilized egg. The mature egg is then

  released by the ovary
• After fertilization, pregnancy takes place. The egg

  attaches to the uterus and continues to grow inside

  the womb.
• Ovulation takes place and the egg enters the

  uterus. Meanwhile the uterus continues to

  thicken. If no fertilization of egg occurs, the cells

  of the thickened uterus break off and leave the

  vagina as menstruation.
• Menopause is when the ovaries stop producing eggs. It usually happens between ages 40-60 years old.
• Menopause is when a woman’s ovaries stop producing eggs. It usually happens between ages 40-60 years old. This means that she can no longer get pregnant naturally.
• During puberty, estrogen levels increase causing breast development (breast budding) and growth of pubic hair. In males, testosterone causes enlargement of penis and scrotum, deepening of voice, and growth of facial and body hair.
• During puberty, estrogen levels increase causing breast development and growth of public hair.
• vagina receives the penis of male

  during mating.
• ovaries produces egg cells
• uterus serves as site of egg

  implantation; it is where the fertilized egg develops.
• oviducts/fallopian tube serves as a passageway of

  eggs from the ovary to the uterus; site of egg

  fertilization.
• seminal vesicle gland secretes a fluid that makes up

  most of the components of the semen.
• prostate gland secretes a slightly alkaline milky fluid that is

  discharged as part of the semen.
• bulbourethral gland secretes a thick and clear mucus that

  lubricates and neutralizes any trace of acidic urine in the urethra.
• testes produces sperm cells.
• scrotum is a sac of skin that holds the testes.
• penis \deposits sperm into the vagina during

  mating.
• vas deferens carries sperm from testes to urethra.
• urethra carries sperm and urine out of the body.
• Homeostasis is the body's natural ability to maintain a stable and

  balanced internal environment despite external changes.