A Level Biology - Exchange Surface and Breathing

Defintion

Keyword

Surface area divided by volume

Tiny folds of the lung epithelium to increase the surface area

Smaller airways leading into the lungs

A layer of muscle beneath the lungs

Mucles between the ribs

Main airway leading from the back of the mouth to the lungs

Refreshing of the air in the lungs

A form of connective tissue

Layer of cells that have many hair-like extensions

Protein fibres that can deform and then recoil to their original size

Cells that secrete mucas

Involuntary muscle that contracts without the need for conscious thought

The number of breaths per minute

Defintion

Keyword

The volume of oxygen absorbed by the lungs in one minute

The volume of air inhaled or exhaled in one breath, usually measured at rest

Device that can measure the movement of air in and out of lungs

The greatest volume of air that can be expelled from the lungs after taking the deepest possible breath

The mouth

Where two fluids flow in opposite directions

Slender branches of tissue that make up the gill

Folds of the filament to increase surface area

Bony flap that covers and protects the gills

Extrernal opening or pore that allows air in or out of the trachea

Fluid found at the ends of the tracheoles

System of air-filled tubes in insects