Shield - Tier 2

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The human body is made up of many different systems that work together to keep us alive and functioning properly. The nervous system, which includes the brain and spinal cord, controls our movements, senses, and emotions. It also regulates our body temperature, heart rate, and blood pressure. The circulatory system, which includes the heart and blood vessels, pumps blood throughout the body, supplying oxygen and nutrients to our cells and organs. The respiratory system, which includes the lungs and airways, brings oxygen into the body and removes carbon dioxide. The digestive system, which includes the mouth, esophagus, stomach, small intestine, and large intestine, breaks down food into nutrients that can be absorbed by the body. The skeletal system, which includes the bones and joints, provides support and protection for our internal organs and allows us to move around. The muscular system, which includes the muscles, enables us to move and maintain posture. The endocrine system, which includes glands such as the pancreas and thyroid, produces hormones that regulate various bodily functions. All of these systems work together to keep our body functioning properly and to help us stay healthy.