Biology

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Suface Area to Volume Ratio
The surface area of an organism divided by its volume, expressed as a ratio
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Alveoli
Tiny folds of the lung epithelium to increase the surface area
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Bronchi
Smaller airways leading into the lungs
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Diaphragm
A layer of muscle beneath the lungs
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Intercostal Muscles
Muscles between the ribs. Contraction of the external intercostal muscle raises the rib cage
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Trachea
The main airway leading from the back of the mouth to the lungs
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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
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Cartilage
A form of connective tissue
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Ciliated Epithelium
A layer of cells that have many hair-like extensions called cilia
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Elastic Fibres
Protein fibres that can deform and then recoil to their original size
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Goblet Cells
Cells that secrete mucus
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Smooth Muscle
Involuntary muscle that contracts without the need fro conscious thought
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Breathing Rate
The number of breaths per minute
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Oxygen Uptake
The volume of oxygen absorbed by the lungs in one minute
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Tidal Volume
The volume of air inhaled or exhaled in one breath, usually measured at rest
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Spirometer
A device that can measure the movement of air into and out of the lungs
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Vital Capacity
The greatest volume of air that can be expelled from the lungs after taking the deepest possible breath
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Buccal Cavity
The mouth
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Countercurrent Flow
Where two fluids flow in opposite directions
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Filaments
Slender branches of tissue that make up the gill. They are often called primary lamellae
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Lamellae
Folds of the filament to increase surface area. They are also called gill plates
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Operculum
A bony flap that covers and protects the gills
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Spiracle
An external opening or pore that allows air in or out the tracheae
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Tracheal System
A system of air-filled tubes in insects
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Tracheal Fluid
The fluid found at the ends of the tracheoles in the tracheal system
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Other cards in this set

Card 2

Front

Tiny folds of the lung epithelium to increase the surface area

Back

Alveoli

Card 3

Front

Smaller airways leading into the lungs

Back

Preview of the back of card 3

Card 4

Front

A layer of muscle beneath the lungs

Back

Preview of the back of card 4

Card 5

Front

Muscles between the ribs. Contraction of the external intercostal muscle raises the rib cage

Back

Preview of the back of card 5
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