Right there are 440 known species of sharks around the world right now discovered by humans so far there are more sharks around the world that we hadn't discovered yet. Here are some sharks: Hammerhead Sharks, Sand Sharks,Saw Sharks, Carpet Sharks and much more.
Let's think about homeostasis in terms of body temperature. Most animals maintain, or hold, their temperature at a certain level. For humans, this is about 98.6°F (37°C). When your hypothalamus senses that you're too hot, it sends signals to your sweat glands to make you sweat and cool you off.