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ch.9 terms

9th grade biology

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
Created by: h.weinstock