If sperm fertilizes the egg cell, it plants itself in the uterus wall and forms an embryo, a mass of cells that can grow into a baby.Ī second egg cell is shown leaving the ovary. TIM: They travel down the Fallopian tubes to the uterus. TIM: During puberty the ovaries start to release one egg cell, or ovum, each month.Īn animation shows an ovum leaving the ovary and traveling along the Fallopian tube into the uterus. The animation zooms in on one of the spherical organs, which is then labeled "ovary". TIM: The sex glands in women are called ovaries. Tubes lead left and right ending in spherical organs. Above this is a diagram of the vagina, and above that is a diagram of the uterus. The exterior opening is shown symbolically as a "Upper Y". TIM: Unlike male genitals, the female reproductive organs are found inside the body.Ī close-up of the female reproductive system is shown. A caption reads: "the female reproductive system". It's a good thing they're so small.Īn outline of a female body appears. TIM: In an adult male, over 250 million sperm cells are made every day. TIM: This mixture of sperm and fluids is called semen. Two more ducts lead from the prostate gland to the testicles. Another duct leads to an organ labeled "seminal vesicles". An organ labeled "prostate gland" has a duct (labeled "sperm duct") leading to the head of the penis. TIM: Sperm move through the sperm duct to mix with fluids from the seminal vesicles and prostate gland.Ī drawing of the interior of the male body is shown. That's why the testicles are outside the body, so they can stay slightly cooler than the temperature of the rest of the body. TIM: Sperm can't survive if they're too warm. TIM: Testicles are two rounded glands that hang under the penis inside a pouch called the scrotum.Ī caption "scrotum" appears with a line drawn to the pouch around the testicles. Just behind the penis inside the body, the outline of two touching spheres appear. TIM: Tiny male sperm cells are produced inside the testicles.Īn outline appears to the left showing a sperm consisting of an oval head with a long tail. The outline of the man shows his penis in a flaccid position. TIM: So the.uh, penis, is one of the male reproductive organs. A caption reads: "the male reproductive system". Let's start with boys.Īn outline of a male body appears. TIM: So here's how the human reproductive systems work. Moby moves his hand to his head and Moby's head begins to shake up and down. Tim is standing next to his robot friend, Moby.
TIM: Dear Tim & Moby, please explain how the reproductive system works, and all that sort of stuff. Text reads: The Mysteries of Life with Tim and Moby.
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