Animal cells often have an irregular shape ... giving insight into the human body and its capabilities. BBC Teach has thousands of free, curriculum-linked resources to help deliver lessons ...

What cells and specialized organs make such crypsis possible for one of the older evolutionary groups of animals ... disrupts the cuttlefish and octopus body outline (Hanlon & Messenger, 1988).

Their body temperature ranges from 93 °F to 107 °F ... The presence of high concentrations of solutes in the cells allows animals such as frogs to hibernate at temperatures below freezing and still ...