Read the explanations given below and name the structures:

Seminiferous tubules

(a) The canal through which the testes descend down into the scrotum just before the birth of a male baby.

(b) The part of the brain that regulates the peristaltic movement of the alimentary canal.

(c) A structure that collects the soundwaves and conducts them through the external auditory canal.

(d) The point of attachment of two chromatids of a chromosome.

(e) Regulation of the opening and closing of stomata.

(a) Inguinal canal

(b) Medulla oblongata

(c) Pinna

(d) Centromere

(e) Guard cells