Identify and describe the functions of the parts of the male reproductive system labeled A-I. Also explain spermatogenesis and the consequences of D being inside the body for reproduction.

Hapa ni majibu yaliyojazwa:

a)
A: Urethra
Function: Transports semen and urine out of the body.

B: Penis (Copulatory organ)
Functions:

• Copulation
• Deposits sperm in the vagina

C: Scrotum
Explain the functions of C:

• Protects the testes
• To keep the testes at a temperature that is lower than body temperature / optimum temperature for sperm production, which is necessary to produce healthy sperm / so that healthy sperms can survive.

D: Testis
Produce: Sperm (By cell division called meiosis) and Testosterone (Male hormone)

E: Epididymis
Function: Part where sperm cells mature and are stored.

F: Vas deferens (Sperm duct)
Function: Transports sperm from the epididymis to the urethra.
When cut: Vasectomy (Result: No sperm in semen)

G: Seminal vesicle
Function: Produces mucus that helps with the movement of sperm.

H: Prostate gland
Function: Produces an alkaline fluid that neutralizes the acidic vaginal fluid. Also, increases the motility of sperm.

I: Cowper's gland
Function: Produces a fluid that provides energy for the sperm cells.

b)
Spermatogenesis:

• Under the influence of testosterone, diploid cells in the seminiferous tubules of the testes undergo meiosis to form haploid sperm cells.

c)
Explain the consequences for reproduction if part D is found inside the body.

• Body temperature of 37°C is too high for optimal sperm production.
• High temperature will lead to the formation of unhealthy sperm.
• Reducing the chances of reproduction (fertilization).

d)
Draw a labeled diagram of a sperm cell

• Tail - Used for swimming
• Nucleus - Contains 23 chromosomes (haploid)
• Mitochondria - Supplies energy for moving/swimming sperm
• Acrosome - Contains enzymes to digest egg cell for fertilization