thats like literally every single thing about biology lmao its all about adapting to your environment and its far far more complicated than even the most cutting edge science has discovered, it goes to a point of genes changing for better or worse heres basic examples temperature regulation when overheated: the body sweats to cool down, blood vessels near the skin dilate (vasodilation) to release heat, and you begin to feel thirsty to replace lost fluids when cold: shivering generates heat through muscle contractions, blood vessels constrict to preserve core temperature, and brown fat is activated to produce heat blood loss/injury response platelets quickly form clots to stop bleeding blood vessels constrict around the injury site to reduce blood loss the heart rate increases to maintain blood pressure the body increases red blood cell production to compensate for lost blood white blood cells rush to the injury site to prevent infection bone fracture healing a blood clot forms around the break new blood vessels grow to supply the area specialized cells called osteoblasts create new bone tissue the body gradually remodels the bone to restore its original strength metabolic stress when blood sugar drops: the pancreas releases glucagon to break down glycogen stores when blood sugar rises: insulin is released to store excess glucose the liver can convert proteins to glucose when needed fat stores can be broken down for energy during prolonged fasting acid-base balance the lungs adjust breathing rate to regulate co2 levels the kidneys can retain or excrete hydrogen ions and bicarbonate blood proteins act as buffers to maintain proper ph bone tissue can release or absorb minerals to help maintain ph balance skin damage the epidermis constantly renews itself, replacing damaged cells melanin production increases with uv exposure for protection when cut, keratinocytes migrate to close wounds new blood vessels form to support healing tissue
United States