The diagram shown below is the longitudinal section of a testis of man. Study it carefully and answer the questions that follow :

(i) Label the parts numbered 1 to 3 in the diagram.
(ii) In which part of the testis are the sperms ?
(iii) State the functions of the parts labelled 1 and 3 in the diagram.
(iv) Name the cells that secrete Testosterone.
(v) Draw a neat, labelled diagram of a sperm.

Explanation