Chapter 21: Sexual Reproduction in Animals

LH

When the egg is released, the levels of ________, FSH and oestrogen decrease, whilst progesterone is released to maintain the uterus lining.

What is a gamete?

It is a "reproductive cell" containing the "haploid number of chromosomes".

What is the the function of testes in male reproductive system?

In testes "sperms and testosterone" are produced.

What is the the function of sperm duct in male reproductive system?

Sperm ducts "carry sperm from the testes to the urethra".

What is the the function of prostate gland in male reproductive system?

It "secretes nutritive fluid" which combines with sperm to produce "semen".

What is the the function of urethra in male reproductive system?

It is a tube which allows "excretion of urine and semen from the body".

What is the function of ovaries in female reproductive system?

Their function is to "develop egg cells".

What is the function of oviducts in female reproductive system?

It contains cilia to "transport the egg cells through the tube".

What is the function of uterus in female reproductive system?

This is where the "fetus develops".

What is the function of cervix in female reproductive system?

Cervix helps "hold the baby in place during pregnancy".

What is the function of vagina in female reproductive system?

Vagina "receives the penis during intercourse".

Explain menstrual cycle.

Menstrual Cycle as follows:

How is embryo developed?

Embryo is developed when the "fertilized egg passes along the oviduct to the uterus", and as it does so it begins to "divide to form a hollow ball of cells" called the embryo.

Give the steps of how a baby is given birth.

Steps for birth are:

Mention methods of birth control.

Following are methods for birth control:

What are the stages of syphilis (STDs)?