Answer :

Blood carries cells so it helps to maintain the whole body homeostasis. When cells are in distress, blood carries what is being needed to fix the situation. Homeostasis is termed as the maintenance to the physiological mechanisms of the body to relatively stable conditions within the body's internal environment despite the changes which occur outside or inside the body, because of pregnancy, variation in external condition, exercise

Homeostasis is a self-regulatory process by which organisms maintains stable internal environment to their sustenance. In humans, blood plays an important role in maintaining homeostasis by performing many functions. Blood supplies oxygen, nutrients to the tissues and removes waste such as carbon dioxide, urea and lactic acid from cells. It circulates chemical messenger such as hormones to the target cells. It regulates body pH, body temperature and osmotic pressure of the blood.