Draw a neat diagram to show the structure of human sperm.

Figure: The structure of human sperm Sperm is a male gamete that is composed of a head, neck, middle piece, and tail. The head of the sperm contains an elongated haploid nucleus. The anterior portion or top of the head is covered by a cap-like structure called an acrosome. The middle piece contains mitochondria. Tail is flagellar in nature.

Differentiate between Graafian follicle and corpus luteum. (any two points).

Features Graafian follicle Corpus luteum Hormones Estrogen is produced by the Graafian follicle. Progesterone is produced by the Corpus luteum. Formation This is formed by the maturation of the primary follicle This is formed by the cells of the ruptured Graafian follicle.