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English blog (44) : Eggs and Ovaries  (3)

The topic of Matsumi Ladies Clinic Mita English blog in November is about eggs and ovaries.

In the final part, I create a medical article about eggs.

 

All sexually reproducing life, including both plants and animals, produces gametes.

The male gamete cell, called sperm, is usually motile.

Whereas the female gamete cell, called the ovum, is generally larger and sessile.

The female gametes are periodically released from the fluid-filled follicles in the ovaries.

 

The male and female gametes combine to produce the zygote cell.

In multicellular organisms the zygote subsequently divides and develops into an embryo.

In most animals the embryo is the sessile initial stage and is followed by the hatching into the motile stage.

 

Insect eggs are often laid on the underside of leaves, whereas reptile and bird eggs, surrounded by a protective shell are laid out of water.

Eggs laid on land or in nests are usually kept within a warm and favorable temperature for the embryo.

In mammals, the fertilized egg develops into fetus in the uterus inside the body.

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