Give differences between:
$(a)$ Testis and ovary
$(b)$ Sperm cell and ovum (egg) cell
$(a)$ Testis and ovary
$(b)$ Sperm cell and ovum (egg) cell
(A)
| Testis | Ovary |
|---|---|
| $(1)$ Testis is an egg-shaped gland with a length of $5 \ cm$ and a diameter of $2.5 \ cm$. | $(1)$ Ovary is an almond-shaped gland with a length of $3 \ cm$,width of $2 \ cm$,and thickness of $1 \ cm$. |
| $(2)$ It produces the male sex hormone,testosterone. | $(2)$ It produces female sex hormones,estrogen and progesterone. |
| $(3)$ Testes are located in the scrotum,outside the abdominal cavity. | $(3)$ Ovaries are located inside the abdominal cavity on both sides of the uterus. |
| Sperm cell | Ovum (egg) cell |
|---|---|
| $(1)$ Sperm cell is motile. | $(1)$ Ovum is non-motile. |
| $(2)$ It consists of a head,middle piece,and a tail. | $(2)$ It is a spherical cell structure surrounded by a zona pellucida layer. |
| $(3)$ Production continues throughout the male reproductive life. | $(3)$ Production stops after menopause (around $50$ years of age). |
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