OCR Biology 3.1 Key Definitions

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  • Created by: milly._98
  • Created on: 25-04-16 10:57
Surface 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 - increases the surface area
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Bronchi
Smaller airways leading to the lungs
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Diaphragm
Layer of muscle beneath the lungs
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Intercostal Muscles
Muscles between the ribs. When they contract, the ribcage rises
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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 air in the lungs. 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 hair like extentions called cilia
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Goblet Cells
Cells that secrete mucus
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Smooth Muscle
Involuntary muscle that contracts without the need for conscious thought
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Breathing Rate
The number of breaths per minute
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Oxygen Uptake
The volume of air inhaled or exhaled in one breath
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Spirometer
A device that can measure the movement of air in 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
Mouth
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Countercurrent Flow
Where 2 fluids flow in opposite directions
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Filaments
Slender branches of tissue that make up the gill
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Lamellae
Folds of the filament to increase the surface area
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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 of the tracheae
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Tracheal Fluid
The fluid found at the ends of the tracheoles in the tracheal system
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Tracheal System
A system of air filled tubes in insects
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Other cards in this set

Card 2

Front

Tiny folds of the lung Epithelium - increases the surface area

Back

Alveoli

Card 3

Front

Smaller airways leading to the lungs

Back

Preview of the back of card 3

Card 4

Front

Layer of muscle beneath the lungs

Back

Preview of the back of card 4

Card 5

Front

Muscles between the ribs. When they contract, the ribcage rises

Back

Preview of the back of card 5
View more cards

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