Good texts will give variations if common. In one year we had difficulty finding a text book pair of kidneys, because they are so variable. Because of this variation you should always look at a number of bodies, prosections or colleagues. Although this is a whole field in itself it is important to recognise the commonest changes due to age, since you will be looking mainly at aged cadavers and young, fit adults. Left ventricle is enlarged as consequence of load.
Veins often varicose.
Often small strokes will cause paralysis and reduction in size of some muscles. Race - This is a tricky one because of its emotive content, and because of the difficulty in defining race since the invention of the bicycle, steamship, jumbo jet etc. have done much to cause intermingling. Males also have narrower hips and broader shoulders. Females have more dermal fat, distributed differently. Facial and body hair also differs.