Animals are in the kingdom Animalia, are multicellular, eukaryotic, heterotrophs whose cells don't have cell walls
Feeding
Most animals cannot absorb food. instead they ingest it. Herbivores eat plants Carnivores eat other animals Omnivores feed on both plants and animals Detritivores feed on decaying plant and animal matter Filter feeders are aquatic animals that strain tiny floating organisms from water Symbiont are parasites that lives within or on another organism, the host. Respiration All animals respire, take in oxygen and give off carbon dioxide Some animals have a very simple, thin-walled bodies, they can rely on the diffusion of these substances through their skin Circulation: Many small aquatic animals, like aquatic worms, rely solely on diffusion to transport oxygen, nutrient molecules, and waste products among all their cells. Larger animals have some kind of circulatory system to move materials around within their bodies. |
Excretion:
Most animals have an excretory system that either eliminates ammonia, a poisonous substance that contains nitrogen, or converts it into a less toxic that is then removed from the body. Response: Animals respond to events in their environment using specialized cells called nerve cells. Most animals have nervous systems. Some have receptor cells, that respond to sound, light, or any external stimuli. Reproduction: Most reproduce sexually, genetic diversity Many introverts can also reproduce asexually Body Symmetry: Asymmetry- no pattern Radial symmetry- shape like a wheel Bilateral symmetry- has a left and right side Cephalization- to have a head |