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body systems

week 7 science vocab

TermDefinition
respiratory system moves oxygen from the outside into the body; removes carbon dioxide and water from the body
circulatory system carries needed substances to cells, and carries waste products away from cells
heart a hollow, muscular organ that pumps blood throughout the body
atrium an upper chamber of the heart that receives blood (your heart has 2 atria)
ventricle a lower chamber of the heart that pumps blood out of the heart (your heart has 2)
valve a flap of tissue that prevents blood from flowing backward
capillaries tiny, narrow vessels where substances are exchanged between the blood and body cells
arteries blood vessels that carry blood away from the heart
veins blood vessels that carry blood back to the heart
pharynx throat
trachea windpipe
bronchus passages that direct air into the lungs
lung main organ of the respiratory system
alveoli tiny sacs of lung tissue specialized for the movement of gases between air and blood
Created by: agroh
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