Question

The diagram refers to the structure of human sperm:

(i) Label the parts 1-4.

(ii) What are the number of chromosomes present in the nucleus of the sperm?

(iii) State the functions of parts 1, 3 and 4.

(iv) Where is sperm produced in man?

Answer 1

(i) 

(ii) A sperm has 23 chromosomes; it is haploid.

(iii) Functions:

• Acrosome: Contains enzymes that help the sperm penetrate the ovum.
• Mitochondria: Supply energy for sperm movement.
• Flagellum: Propels the sperm forward.

(iv) Sperms are produced in the seminiferous tubules of the testes.