![]() ![]() TIM: The zygote divides into two cells, then four cells, then eight, and so on, splitting about once every 20 hours until it's a hollow ball called a blastocyst.Ī zygote is represented by a light colored circle with a thin white edge, with a smaller round shape of a different color drawn in the center. Once the sperm cell and the center portion of the egg cell become one, the egg cell increases in size. A sperm cell is shown entering the outer portion of the egg cell and then moves towards the center of the egg cell. TIM: The egg cell and sperm cell join together to make a whole new cell called a zygote, a fertilized egg cell.Īn animation shows an egg cell, represented by a light colored circle with a smaller round shape of a different color drawn in the center of the circle. Several other sperm cells surround the egg cell. TIM: Out of the hundreds of millions of sperm cells released when a couple has sex, it only takes one to fertilize the egg.Īn image shows the female egg with one sperm cell entering it. The magnified portion of the animation is labeled "fertilization". Once the sperm cells and the egg cell meet the animation zooms in on a cross section to show one of the sperm cells entering the egg cell. TIM: While the egg is moving through the tubes, it can be fertilized by a male sperm cell.Īs the egg is moving down the fall op i an tube, several sperm cells, represented by white dots, are moving in the other direction toward it. A line is drawn from the ovary to a label that reads: ovary. A line is drawn from the fall op i an tube to a label that reads: fall op i an tube. An egg, represented by a yellow dot, then starts moving from the ovary up the fall op i an tube. ![]() TIM: When a woman hits puberty, her ovaries begin to release one egg into the fallopian tubes each month.Īn animation shows one of the ovaries and a fall op i an tube. A cross section of the left ovary is magnified to show the egg cells. Both ovaries have lines drawn to them and are labeled with the text: ovaries. TIM: Women are born with about 100,000 egg cells or ova, in their ovaries.Īn animation starts by showing a woman's silhouette and then zooms in to the lower part of her torso to show the internal reproductive organs. At the top right, text reads: "fertilization". Once one of the sperm cells reaches the egg cell animation labels the egg cell and the sperm cell as "egg cell" and "sperm cell" respectively. The whole human development process starts when a female egg cell is fertilized by a male sperm cell.Īn animation shows several sperm cells moving towards a female egg cell. TIM: Dear Tim and Moby, how does a baby grow? From, Eric. He reads from a typed letter with egg yolks. Tim, with the egg broken over his head, runs down his face. Moby drops the egg and throws it back to Tim. Tim and Moby throw the egg back and forth to each-other. Text Reads: The Mysteries of Life with Tim and Moby ![]()
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