Although specific anatomies appear different, male human bodies generally consist of a head and neck that attach to the upper portion of the torso. Two sets of limbs, the arms and legs, attach at the upper and lower corners of the torso, with the sex-specific male genitalia between the legs. The arms, consisting of two segments, end in five-digit hands, while the legs, also two segments, end in five-digit feet.
The most notable indicators of sexual dimorphism between human males and females is that the former has a different set of gonads, consisting externally of a penis and scrotum. Internally, men develop differentiated endocrine systems that produce, on average, more testosterone. Males develop more muscle and greater height and weight on average, though individual females may possess greater strength and height than individual males based on the wide range of human groups.
Male anatomy also conspicuously lacks secondary sex characteristics such as breast differentiation found in females. Likewise, male hair distribution, although similar to females, is generally heavier around the face and across the body.
Genetically, men and women differ. While the latter typically have two X chromosomes, the former usually have one X and one Y chromosome. This is not a strict binary, however, as genetic expression may encompass a range of values that produce numerous exceptions.