Kidneys are important in homeostasis as they control the blood water level and the regulation of salt and iron contents within the body. See related links for more info. Kidneys are important in homeostasis as they control the blood water level and the regulation of salt and iron contents within the body.
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Increasing thirst when cells are low on water because you want to get back to equilibrium and have your cells be back to baseline for water.
The right answer is they are a major part of a food chain
An invertebrate is an animal that has no verbal spine or other internal bones. Insects, spiders, molluscs and crustaceans belong to this group. Their lifestyle, diet and habitat are very diverse. They live on land, in the sea or in fresh water. Some fly like insects. They are the prey of the upper trophic level.