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science vocab ch 9

tissue, muscles, systems

homeostasis the state of having a stable internal environment.
tissue a group of similar cells working together
epithelial tissue covers and protects underlying tissue
nervous tissue sends electrical signals through the body
organ two or more tissues working together
organ system organs that work together
muscle tissue is made up of cells that can contract and relax to produce movement
connective tissue joins, supports, protects, insulates, nourishes, and cushions organs
skeletal system are the structures that connect bones to catilage.
compact bone the bone tissue that does not have any visible open spaces
muscular system is made up of muscles and the connective tissue that attaches the muscles to the bone.
smooth muscle is found in the digestive tract and the walls of blood vessels
cardiac muscles are a type of muscle found only in your heart
skeletal muscle is attached to your bones for movement and it helps protect your innner organs
integumentary system your nails, hair, and skin.
sweat glands make sweat
melanin a darkening chemical in skin
epidermis is the innner layer of the two.
dermis the deeper, thicker layer
hair follicle is formed at the bottom of a tiny sac