BIOLOGY UNIT2 K1

Gamete production and fertilisation

What is the function of the testes

The testes produce sperm in the seminiferous tubules

The testes produce testosterone in the interstitial cells

What is the function of the Prostate gland and seminal vesicles ?

The prostate gland and the seminal vesicles secrete fluids to maintain mobility and viability of sperm

What is the function of the sperm duct ?

The sperm duct transports sperm from the testes to the urethra

What is the function of the urethra ?

The urethra releases sperm (and urine)

Name 1,2,3,4,5 and 6

1. seminial vesicles

2. prostate

3. sperm duct

4. urethra

5. penis

6. testis

What type of cells are gametes produced from ?

Gametes are produced from germline cells

Where are germline cells found in the testes and what is their function ?

Germline cells are found in the seminiferous tubes in the testes and gremlin cells produce sperm

What does semen contain ?

Semen contains sperm from the testes and fluid selections from the seminal vesicles and prostate gland that maintain the mobility and viability of sperm 

Name 1,2,3 and 4

1. sperm cell

2. seminiferous tubules

3. interstitial cell (inbetween tubules)

4. germline cell

Name 1,2 and 3

1. sperm duct

2. seminal vesicle

3. prostate gland

What is the function of the ovaries ?

The ovaries produce ova (female gametes) and the hormone oestrogen and progesterone

What is the function of the oviduct ?

The oviduct is the site of fertilisation 

What is the function of the follicle ?

The follicle is the structure that surrounds and protects the developing ovum and secretes the hormone oestrogen

What is the function of the corpus luteum ?

The corpus luteum develops the follicle following ovulation and secretes the hormone progesterone

What is the function of the endometrium ?

The endometrium is the inner lining of the uterus where the embryo implants 

What is the function of the uterus ?

The uterus is where the foetus develops during pregnancy

What is the function of the cervix ?

The cervix is the muscular ring between the vagina and uterus and it secretes cervical mucus which is important in fertility

What happens to the follicle after ovulation ?

After ovulation the follicle develops into a corpus luteum

Name 1,2,3 and 4 

1. corpus luteum

2. germline cell in ovary lining 

3. immature follicle 

4. mature follicle 

Name 1,2 and 3

1. ovidcuct

2. uterus lining - endometrium

3. ovary

What happens during fertilisation ?

Mature ova are released into the oviduct where they may be fertilised by sperm to form a zygote.

What is fertilisation (definition)

Fertilisation is when the nucleus of a sperm fuses with the nucleus of an ovum

Where does fertilisation occur and what is produced ?

Fertilisation occurs in the oviduct and it produces a zygote