Give scientific reasons : Testis are located in the scrotum outside the abdominal cavity.
Give scientific reasons : Testis are located in the scrotum outside the abdominal cavity.
By the process of spermatogenesis of testes, spermatids and spermatozoa are formed. For this whole process the temperature of testis is below $3^{\circ} \mathrm{C}$ than the body temperature. It is necessary for spermatogenesis. The scrotum helps in maintaining the low temperature of testis.
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In most of the mammals the testes are situated outside the abdominal cavity because
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Mention the location and structure of testes and explain about seminiferous tubules.
Mention the location and structure of testes and explain about seminiferous tubules.
Match the columns.
Column $I$
Column $II$
$(a)$ Seminiferous tubules
$(1)$ Place for storage and maturity of sperm
$(b)$ Urethra
$(2)$ Structure which releases out sperm cells
$(c)$ seminal vesicle
$(3)$ A gland exist in pair producing nutrients
$(d)$ Epididymis
$(4)$ Coiled duct where sperms start development
Match the columns.
| Column $I$ | Column $II$ |
| $(a)$ Seminiferous tubules | $(1)$ Place for storage and maturity of sperm |
| $(b)$ Urethra | $(2)$ Structure which releases out sperm cells |
| $(c)$ seminal vesicle | $(3)$ A gland exist in pair producing nutrients |
| $(d)$ Epididymis | $(4)$ Coiled duct where sperms start development |