How do snakes manage to swallow and digest animals that are bigger than their heads? Unlike humans and many other animals, snakes don’t chew their food. They swallow their prey whole, which can ...

Defecation is commonly treated as a universal feature of animal life, a visible outcome of digestion and metabolic turnover. In biological terms, however, waste handling takes multiple forms, shaped ...

Whereas human and many animals use teeth to crush or grind food as an initial part of the digestive process, some species such as birds that lack teeth grind food inside the gizzard -- a structure ...