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The diploid number of chromosomes in a human is 46. Therefore, the number of chromosomes in a primary spermatocyte or primary oocyte is ___.

Sperm cells get energy to power their movement from ___ secreted by the ____.

Females have more urinary tract infections than men because of all of the following except___.

When it’s cold, the ___ contracts and dras the testes closer to the body to keep them warm.

The ____ provides fetal nutrition and secretes hormones that regulate prgancy and fetal development.

The ___ is the site of attachment of the embryo.

Females have more urinary tract infections than men because of all of the following except___.

The nonpregnant uterine wall concists mostly of ___, which is conpposed of ___.

Which of the following puts the renin- angiotensin-aldosterone mechanism in the correct order?

The penis is homologous to