Biology 0.0 / 5 ? BiologyModule 3.1ASOCR Created by: Tyler-Louise2001Created on: 15-04-18 13:03 Suface Area to Volume Ratio The surface area of an organism divided by its volume, expressed as a ratio 1 of 25 Alveoli Tiny folds of the lung epithelium to increase the surface area 2 of 25 Bronchi Smaller airways leading into the lungs 3 of 25 Diaphragm A layer of muscle beneath the lungs 4 of 25 Intercostal Muscles Muscles between the ribs. Contraction of the external intercostal muscle raises the rib cage 5 of 25 Trachea The main airway leading from the back of the mouth to the lungs 6 of 25 Ventilation The refreshing of the air in lungs, so that there is a higher oxygen concentration than in the blood, and a lower carbon dioxide concentration 7 of 25 Cartilage A form of connective tissue 8 of 25 Ciliated Epithelium A layer of cells that have many hair-like extensions called cilia 9 of 25 Elastic Fibres Protein fibres that can deform and then recoil to their original size 10 of 25 Goblet Cells Cells that secrete mucus 11 of 25 Smooth Muscle Involuntary muscle that contracts without the need fro conscious thought 12 of 25 Breathing Rate The number of breaths per minute 13 of 25 Oxygen Uptake The volume of oxygen absorbed by the lungs in one minute 14 of 25 Tidal Volume The volume of air inhaled or exhaled in one breath, usually measured at rest 15 of 25 Spirometer A device that can measure the movement of air into and out of the lungs 16 of 25 Vital Capacity The greatest volume of air that can be expelled from the lungs after taking the deepest possible breath 17 of 25 Buccal Cavity The mouth 18 of 25 Countercurrent Flow Where two fluids flow in opposite directions 19 of 25 Filaments Slender branches of tissue that make up the gill. They are often called primary lamellae 20 of 25 Lamellae Folds of the filament to increase surface area. They are also called gill plates 21 of 25 Operculum A bony flap that covers and protects the gills 22 of 25 Spiracle An external opening or pore that allows air in or out the tracheae 23 of 25 Tracheal System A system of air-filled tubes in insects 24 of 25 Tracheal Fluid The fluid found at the ends of the tracheoles in the tracheal system 25 of 25
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