BIOL 1002 Chapter : Chapter 23 And 24
Document Summary
The main distinguishing features of the kingdom animalia are. These characteristics are in no way defining characteristics. Ingestive method of digestion: means we"re going to need mechanisms for internal breakdown, not as likely to lose proceeds of that breakdown to the external environment. No cell wall: an important distinction for animals. If you don"t have a cell wall that means that you can actually swell up too big and the cell will actually pop like an over inflated balloon. Rapid response to stimuli (nerves and muscles: example: a dog reacting to a whistle and a cat responding to a toy. Life cycle with embryonic development: comes really close to being a defining characteristic. All animals go through embryonic development, no fungi do, but some plants do. So we have to consider them aerobic as well: animals need much more oxygen because their metabolic rate is higher than the other kingdoms.
