Question

what is reproductive phase

Answer 1

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The period in which an organism are able to reproduce sexually is called reproductive phase.It is different in different organisms. In humans reproduce phase is between 18 to 45 years.
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Answer 2

$\tt\pink{\underline{Testis}}$

→A pair of testis is situated outside the abdominal cavity in a sac of skin is called the scrotum. Scrotum keeps the testes at a temperature 22.5 degree Celsius lower than the internal body temperature which is necessary for the synthesis of sperms .

→Each testis is oval in shape measures about 4 to 5 cm in length and is 2 to 3 cm in width .

→The outermost covering of the testes is formed by a dense fibrous membrane called tunika albinia .

→Each testes is divided into 250 compartments called testicular lobules .