Modern medicine defines human sexual life as a group of activities that are driven by (), ended with ()and aimed at giving and obtaining varying degrees of sexual satisfaction .

Modern medicine defines human sexual life as a group of activities that are driven by (), ended with ()and aimed at giving and obtaining varying degrees of sexual satisfaction .
A.Sexual desire, skinB.Sexual desire, reproductive organC.Excitement of cerebral sexual center,skinD.Excitement of cerebral sexual center, reproductive organ正确答案:Excitement of cerebral sexual center,skin

What is spermatogenesis

What is spermatogenesis
A.The process in which spermatids metamorphose into spermB.The process in which spermatogonium forms spermC.The process in which primary spermatocyte forms spermD.Meiosis procedure of spermatogonium正确答案:The process in which spermatogonium forms sperm