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Sexual reproduction in humans video download

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Reproduction leads to population growth. Reproduction in humans is called sexual reproduction.

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Sexual reproduction results in genetic diversity. The penis delivers the sperm. Sperm is made in the testes after puberty and matures in the epididymis. The testes or testicles hang in a baglike structure called the scrotum. Having the testes outside the pelvis keeps them at a lower temperature.

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The testes also produce the hormone testosterone. Men and women have a urethra. The seminal vesicles, prostate gland, and bulbourethral glands produce the liquid called semen.

The Role of the Male

It is a tube that leads from an opening outside of the body to the uterus. The uterus, or womb, is a thick muscular organ that hold and nourishes the developing offspring. The end of the vagina and beginning of the uterus is called the cervix. The egg is released in a process called ovulation and moves towards the fallopian tube, waiting to meet the sperm.

Fertilization is when an egg cell and a sperm cell unite.

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Fertilization occurs in the fallopian tubes. A zygote is a combination of a sperm and egg cell. The sperm and egg unite to form a zygote, and the zygote eventually becomes a baby.

The zygote goes through a series of cell divisions called cleavage: The period from fertilization to birth is called pregnancy or the gestation period. During the first trimester first three months The zygote divides several times to form a blastula. Human embryo implants itself on the uterus about 8 to 9 days after fertilization.

The reproductive system

After implantation, cells continue to divide to form a gastrula. The gastrula is composed of 3 germ layers: Ectoderm forms into skin, nerves, and sense organs.

Mesoderm forms into bones, muscles, and connective tissue. Endoderm forms the digestive system and lungs. The embryo is now called a fetus. The mother starts to feel the fetus moving. By the end of the second trimester, the fetus has fully developed eyes, and the lungs are starting to develop. The brain develops and the fetus has regular breathing motions by the 7th month, though the lungs are still developing.

Sexual reproduction Two parents- each parent contributes half of its genetic information to the offspring Maintains variety within a species. Describe the process of human development from fertilization. My presentations Profile Feedback Log out. Auth with social network: Registration Forgot your password? Download ppt "Human Reproduction Mr. Reproduction and Development How are humans made? About project SlidePlayer Terms of Service. Feedback Privacy Policy Sexual reproduction in humans video download.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policyincluding cookie policy. Biology: Sexual Reproduction in Humans:Male & Female Anatomy 2 hours on- demand video; 5 downloadable resources; Full lifetime access; Access on.

Five clips in all on YouTube, preview them first, some are fine for year 7, others GCSE and A Level. I have downloaded them just in case they disappear. Watch Human reproductive system by Aqeelnaqvigg1 on Dailymotion here.

Psychology- Sexual selection and human reproductive behaviour ·

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