Organic systems such as the integumentary, skeletal, nervous, and endocrine systems all play important roles in helping the body maintain homeostasis. The integumentary system helps maintain by providing protection, regulating body temperature and sensory receptors. All of this plays an important role in maintaining the internal conditions for the body to function. The skeletal system helps by producing red blood cells in place of old ones that die. It also helps maintain calcium levels in our bloodstream. The nervous system maintains homeostasis by controlling and regulating other parts of the body, for example telling you when you are tired or when you are hungry. It ensures that the body acts as it should by using receptors. The endocrine system releases hormones that are sent to different parts of the body and control the body's response to factors like stress, pain, and growth. These hormones give instructions to the body for the fight or flight response so that it can adjust and maintain