exchange surfaces and breathing Flashcards
what is surface area to volume ratio?
the surface area of an organism divided by its volume, expressed as a ratio.
what are the features of a good exchange surface?
- a large surface area
- a thin barrier
- a good blood supply
what are the tissues in the gaseous exchange system?
- lung tissue
- the trachea and bronchi
- the bronchioles
- smooth muscle and elastic tissue
how are lung volumes measured?
using a spirometer
what is counter current flow?
where two fluids flow in opposite directions.
what is a buccal cavity?
the mouth
what are filaments?
- slender branches of tissue that make up the gill
- also called primary lamellae
what is lamellae?
- folds of the filament to increase surface area
- all called gill plates or secondary lamellae
what is the operculum?
-a bony flap that covers and protects the gills
what is a spiracle?
an opening that allows air in or out the tracheae
what is tracheal fluid?
fluid found at the end of the tracheoles in the tracheal system.
what is the tracheal system?
a system of air filled tubes in insects
