They are a species, the definition is:
A group of organisms that have similar characteristics and can interbreed to produce fertile offspring
Male sperm enter woman’s ovaries through sexual intercourse creating an embryo.
The countercurrent heat exchanger that prevents arterial blood from overheating the testes is the pampiniform plexus of veins. The pampiniform plexus helps to regulate testicular temperature, allowing sperm maturation. It surrounds the testicular arteries and works as a countercurrent heat-exchanger system to cool the arterial blood before entering the testes. This is because the sperms can not develop if the testis is at body temperature.
The simplest form of carbohydrate is glucose. So, starch is a complex carb, while sugar is a simple carb.
Argyroneta aquatica because it is the only species of spider that lives entirely uder water
