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ch.9 terms
9th grade biology
Question | Answer |
---|---|
alveleoli | tiny saclike structures in the lungs at which gas exchange takes place |
arteries | a blood vessel that carries blood away from the heart |
atrium | the thin-walled, upper chambers that receive blood into the heart |
bronchi | two tubes that branch off from the trachea and enter the lungs |
bronchioles | several small tubes that branch off from the bronchi and lead into the alveoli of the respiratory system |
capillary | the smallest blood vessel in a closed circulatory system; where materials are exchanged with surrounding tissues |
cilia | small, hairlike structures on the surface of cells that aid life processes |
circulation | the movement of blood through the blood vessels of an animal |
closed circulatory system | a transport system in which the blood does not leave the blood vessels |
diastolic pressure | the pressure of the blood between heart contractions, at its lowest point |
exhalation | the movement of air out of the respiratory system |
gills | the respiratory organs of waterbreathing vertebrates |
inhalation | the movement of air into the respiratory system |
nasal cavity | the start of the respiratory system at which the air is filtered, odors are detected, and humidity and temperature are adjusted for respiration |
open circulatory system | system in which blood circulates around the organs |
phloem | tubes that carry carbohydrates from the leaves to the rest of a plant |
plasma | the liquid portion of blood; contains water and dissolved substances |
platelets | fragments of blood cells that help the blood clot normally |
pulmonary | pertaining to structure and/or function of the lungs |
respiratory surface | the moist area of an animal at which gas exchange occurs |
root hairs | an extension of the cells that line roots, which increases the surface area for absorption |
systemic | pertaining to the whole body of an organism |
systolic pressure | the pressure of the blood when the heart is contracting, at its highest point |
trachea | the air tube that connects the pharynx to the bronchi; the windpipe |
tracheae | in insects, air tubes that connect the inside to outside for gas exchange |
transpiration | in plants, the loss of water vapor from the stomates of a leaf |
veins | a blood vessel that carries blood toward the heart |
ventricle | the thick-walled, lower chambers that push blood out of the heart |
xylem | tubes that carry water and nutrients from the roots up through a plant |