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Capter 4 Mod 1


Skeletal system Consists of 206 bones in an adult.
Muscular system Consists of skeletal, smooth and cardiac muscles.
Cardiovascular system Consists of the heart, blood vessels, and blood.
Lymphatic/Immune system Consists of the lymph, lymph nodes and vessels, white blood cells, spleen, tonsils, and lymphocytes.
Nervous system Consists of the brain, spinal cord, and peripheral nerves.
Respiratory system Consists of the nose, sinuses, larynx, epiglottis, trachea, and lungs, including lung structures such as the bronchus, bronchioles and alveoli.
Digestive system Consists of the oral cavity, esophagus, pharynx, stomach and the small and large intestines.
Endocrine system Consists of the thymus, gonads, pituitary, thyroid, pancreas, and adrenal glands.
Long bones Located in the upper and lower extremities.
Sesamoid bones Small floating bones found near joints.
Irregular bones Vary in shape, size, and surface traits.
Flat bones Have broad surfaces that protect the organs and serve as attachment areas for muscles.
Short bones Small and cube shaped and are found in the wrists and ankles.
Compact bone Is known as hard bone due to its density and strength.
Cancellous bone Known as spongy bone, is less dense and is lighter in weight than compact bone.
Muscle origin The location where the muscle attaches to the bone originally, and it is fixed or nonmoveable.
Muscle mass This composes 40%-45% of a human's body weight.
Striated Muscles Long cylindrical fibers that are arranged parallel to each other.
Smooth muscles Produce involuntary movements such as breathing and digestion.
Cardiac muscles Resembles the striated muscle tissue, but it conducts electricity, it lacks elasticity, and its movement is involuntary.
Created by: mgarrett