Body Systems

gives the body structure and protects internal organs

works with the skeletal system to allow the body to move

breaks down food to give the body energy

removes waste products from the body

responds to stimuli in the environment, and controls most body functions

carries needed materials to the body cells, including oxygen; carries waste away from the body, including carbon dioxide

takes oxygen into the body when we inhale, and releases carbon dioxide when we exhale

protects the body, releases excess water in sweat, and helps regulate body temperature

produces sex cells that can unite with other sex cells to create offspring

closely related to the immune system; helps fight viruses, germs, and diseases

mouth, esophagus, stomach, liver, pancreas, small intestine, large intestine, rectum, anus

heart, arteries, capillaries, veins, blood, white blood cells

nose, trachea, larynx, bronchi, lungs, alveoli, diaphragm

carry oxygen-rich blood away from the heart to other parts of the body

carry oxygen-poor blood back to the heart

contain oxygen-poor blood

contain oxygen-rich blood

right atrium, right ventricle, lungs, left atrium, left ventricle, aorta

large, flat muscle at the bottom of the chest cavity that helps with breathing; when it is contracted oxygen is inhaled, and when it is relaxed carbon dioxide is exhaled

transports nutrients, gas, and waste to the body; gives blood it's color

part of the blood that helps destroy bacteria and fight disease

part of the blood that helps it clot to form scabs

Liquid part of blood, made mostly of water, salt, sugar, and protein

smallest blood vessel; brings nutrients and oxygen to the tissues and absorbs carbon dioxide and waste products

small air sacs in the lungs where oxygen and carbon dioxide are exchanged

two short branches located at the lower end of the trachea that carry air into the lungs

smallest branches of the bronchi