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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.
Best Answer: We need proteins!!! Your body is mad up of about 20% protein which makes up enzymes, hormones and components of cell membranes amongst many other things Enzymes denature and cells die so these proteins need to be replaced.New proteins need to be resynthesised by protein synthesis.est Answer: We need proteins!!! Your body is mad up of about 20% protein which makes up enzymes, hormones and components of cell membranes amongst many other things Enzymes denature and cells die so these proteins need to be replaced.