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Muscles enable the heart to beat, the chest to rise and fall during breathing, and blood vessels to help regulate the pressure and flow of blood through the body. When we smile and talk, muscles help us communicate, and when we exercise, they help us stay physically fit and healthy.
Transcript of Why Do humans need food to survive. photo credit Nasa / Goddard Space Flight Center / Reto StÃ¶ckli Why humans need food to survive? The first reason why humans need food is because animals and human get energy from the food they eat and it also provides us with nutrients and to make us be healthy and active. Food also provides us for Development and growth.