Human reproduction
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Human reproduction

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Science Aicle class

Science Aicle class

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     Human reproduction Human reproduction Presentation Transcript

    • Hamzaand Xavi
    •  The female reproductive system has three main functions: to produce eggs Secondary sexual in the ovaries , to make fertilisation possible and to protect and feed the characteristics embryo until birth. The female reproductive system  Make women and men look different matures between the age of 11 and from each other. Girls change 14. This period is called puberty. It is physically during puberty; their breasts when secondary sexual characteristics develop and their hips get wider. appear  The ovaries produce an egg every 28 days. In the beginning of the menstrual cycle, the egg leaves the ovary, it goes to the fallopian tubes. It stays there for a short period of time and dies if it is not fertilised.
    •  The male reproductive organs are  The male internal reproductive organs different in shape and structure from are: female ones. Both are specifically  The testicles: The testicles produce designed to produce and transport and store millions of sperm cells. They eggs (female) or sperm (male). are oval-shaped. Now we will tell you the male external  The vasa deferentia. These are the reproductive organs are: tubes that take the sperm from the The Penis, a cylindrical-shaped testicles to the seminal vesicles. muscular organ that contains a tube called urethra. The Scrotum, a bag of skin that contain the testicles. It helps to regulate temperature of testicles..
    •  A sperm from a man and an ovum/egg from a woman are necessary to create descendents similar to them. The sperm enters the egg and fertilises it. They form a new cell called a zygote. When it consists of about 100 cells, it is called an embryo. Then the placenta forms and is connected to the baby through the umbilical cord so the baby receives nutrients Pregnancy last 39 or 40 weeks. The baby measures about 50 cm and weighs 3 kilos when it is born. Human females have special glands that produce milk to feed their babies. These glands are called mammary gland or breasts. The milk contains essential nutrients make the baby’s system stronger.