Answer:When a wound causes bleeding, the body responds with a positive feedback loop to clot the blood and stop blood loss. Substances released by the injured blood vessel wall begin the process of blood clotting
Explanation:
The answer to your question is indeed <span>Precambrian. It lasted about 4 billon years.</span>
Answer:
pygrogen
Explanation:
Fever is initiated when a substance in circulation, called a(n) pygrogen, acts on the hypothalamus causing it to reset body temperature to a higher setting.