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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 |
Created by:
h.weinstock
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