Pulmonary Artery - The blood vessel that carries blood to the lungs, Arteries - Blood Vessels with muscular elastic walls, Capillaries - Blood vessels that allow diffusion to occur, Alveoli - Small air sacs in the lungs, Diaphragm - Muscle that increases and decrease the size of the lungs, Aorta - Artery that carries blood to the entire body, Veins - Blood vessel that returns blood to the heart and contains valves, Liver - Organ that produces bile to break down fats, Small Intestine - Absorbs the majority of nutrients during digestion, Pancreas - Produces several enzymes integral in digestion, Rectum - A storage are for waste following digestion, Peristalsis - A muscular contraction that pushes food throughout the digestive system, Oesphagus - A muscular tube that carries food to the stomach, Trachea - The windpipe , Epiglottis - The flap that prevents food entering the trachea, Vena Cava - Large blood vessel that returns blood to the heart from the body, White Blood Cells - Part of the blood that fights off infection, Nasal Cavity - Contains nose hairs that filters air,

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