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The gonochoristic organism describing biological sex that releases sperm cells into the female vagina to the cervix and uterus for fertilization is male.The distinct functions associated with male body are sperm production, maintenance, and transportation of sperm into the female reproductive tract.

Some physical features of a male body are more muscle mass than a female, broad shoulder, lower body fat than women, muscular back, and small waist. The male's sexual characteristics are facial hair, heavier skull, pubic hair, and chest hair.

The termpaternity represents the father's relationship with his particular child,and the man being a child's biological father can be tested through paternity testing.

Some of the benefits provided by paternity are greater relationship stability, a stronger bond with the child, a role in child development, and higher parental satisfaction. Examples of paternity tests include legal and immigration paternity testing.

The offspring's survival and development are associated with male parental care (male investment in caring for his offspring).

The potential of male parental care or paternity increases with external fertilization (gametes fusion takes place outside the female's body).In external fertilization, paternity is having fertilization control, and this increases paternity confidence.