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1-20-2021 7th Grade Circulatory and Respiratory Systems Coach Walters

Terms in this set (20)

trachea
windpipe; tube through which air moves
alveoli
tiny sacs of lung tissue specialized for the movement of gases between air and blood
lungs
two large respiratory organs inside the chest where blood picks up oxygen and loses carbon dioxide
bronchioles
small subdivisions of the bronchi that are dead ends with tiny air sacks called alveoli at the end
bronchi
two short branches located at the lower end of the trachea that carry air into the lungs.
epiglottis
a flap of tissue that seals off the windpipe and prevents food from entering
larynx
voice box; passageway for air moving from pharynx to trachea; contains vocal cords
diaphragm
muscular partition that separates the thoracic cavity from the abdominal cavity and aids in respiration by moving up and down
pharynx
throat; passageway for food to the esophagus and air to the larynx
diffusion
the process by which molecules move from an area of higher concentration to an area of lower concentration
ventilation
the bodily process of inhalation and exhalation
pulmonary capillaries
surround the thin tissue membranes of the alveoli; site of gas exchange in blood
oxygenated
blood containing oxygen
deoxygenated
blood containing no oxygen, containing a higher concentration of carbon dioxide than oxygen
heart
multi-chambered, muscular organ that pumps blood throughout the body
pulmonary artery
carries deoxygentated blood from the heart to the lungs
pulmonary vein
carries oxygenated blood from the lungs to the heart
vena cava
One of two large vessels (superior and inferior) that return deoxygenated blood to the right atrium of the heart.
atrium
upper chamber of the heart that receives and holds blood that is about to enter the ventricle
ventricle
lower chamber of the heart that pumps blood out of the heart
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