Human Reproduction


Humans reproduce sexually and internal fertilization takes place. Both sexes in humans have a set of gonads where gametes are produced.
They have ducts for delivery of gonads and structures for copulation.

Male
Female
Testes
Ovaries
Several glands contribute to the formation of fluid that nourishes and protects the sperm
Contain follicles that nurture eggs and produce sex hormones
During ejaculation the sperm and the nourishing fluid (semen) are expelled through the penis.
Eggs are fertilized in fallopian tubes.

Women go through the ovarian and menstrual cycles in order to prepare the body for a potential zygote (fertilized egg).
If a sperm does not fertilize an egg (which happens most of the time), a women goes through the menstrual cycle.
When a woman runs out of eggs menopause occurs.
Find out more about a women's reproduction, go through this tutorial.

Ovarian Cycle-

  • Changes in the ovary that occur every 28 days.
  • A woman ovulates on Day 13 to 15

Menstrual Cycle-

  • Involves changes that occur in the uterus
  • The uterine lining is shed for 3-5 days. This is called menstruation
  • Before the menstrual cycle, a women often acquires Premenstrual Syndrome (PMS) which is when the female sex hormones estrogen and progesterone are at different levels. This causes many different symptoms such as mood swings and food cravings.
external image bdy_img_diagram.jpg

This is a diagram of the women's reproduction system.
This is where menustration and ovulation takes place.


Sprem Production

Visit this website for more information on sprem production.

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The Journey of the Sperm
When a pair of humans are ready to reproduce, nessessary steps must be taken.
The woman's body needs to be fully developed and the man should have healty sprem.
When fertilization occurs, millions of sperm enter the women's vagina through the cervix.
The sperm race to a potential egg in the fallopian tubes. But it is a long and strenous journey.
Lucky sperm arrives at the egg and pushes through the eggs membrane. This is a zygote!



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This image shows the female uterus after conception.
The sperm are "racing to the egg