The human body consists of a number of interacting 'systems'.The skeleton forms a rigid framework,Which,attached system responsible for the body's reaction to stimuli. Hormones, produced by the endocrine system,control many functions,including growth and developmental changes such as puberty. The cardiovascular system circulates blood around the body,delivering oxygen and nutrients and collecting carbon dioxide and waste,while the respiratory system fights infection.The digestive system derives energy and nutrients for growth and repair from food,and with the urinary system eliminates waster;the urinary system also helps to regulate chemicals in the body. The reproductive system is concerned with producing offspring.
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