Skeletal System
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The skeletal system is made up of bones and cartilage that support the body, allow movement, and protect organs. It includes the smallest bones in the ears and the largest in the pelvis and femur. Bones grow in length during childhood and adolescence and become denser and stronger through exercise and consuming calcium and vitamin D.
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The document discusses the skeletal system, its major functions, parts, and features. The skeletal system contains bones and tissues that provide structure, protect organs, allow for movement, store calcium, and form blood cells. The key parts of the skeletal system are bones, tendons, ligaments, and cartilage. Bones have compact and spongy layers and marrow. There are different types of joints like ball-and-socket, pivot, hinge, gliding, and others that enable different motions.
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Urinary System
The kidneys are two bean-shaped organs located near the middle of the back, below the rib cage. They filter waste and excess water from the blood to produce urine. The kidneys help regulate blood pressure, make red blood cells, and keep bones and muscles healthy by maintaining the right balance of calcium, phosphorus, and other minerals in the body.
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Circulatory system
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Digestive System
The digestive system breaks down food and absorbs nutrients and water. It begins in the mouth where teeth chew food which is then swallowed to the stomach. The stomach acids break food down further and send it to the small intestine, where most nutrients are absorbed with help from the liver and pancreas. Remaining waste passes to the large intestine where water is absorbed before waste is excreted as feces.
Respiratory system
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Circulatory system
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