Gas Exchange Systems

HideShow resource information
  • Created by: 104608
  • Created on: 04-05-16 14:17
What's the direction of water through a fish, to give them oxygen?
The water goes in through their mouth and out through the their gills
1 of 10
What do the gills do?
They increase the surface area for gas exchange
2 of 10
What are Gill filaments?
Thin plates they make up the gills
3 of 10
What are lamellae?
Small projections covering the gills to increase surface area
4 of 10
What do the lamellae have which increases gas exchange?
They have lots of blood cappillaries which are one cell thick to allow a shorter diffusion distance
5 of 10
How is the counter current system created?
The blood flows through the lamellae in one direction and water flows over in the opposite direction
6 of 10
How does the counter current system increase gas exchange?
It increases the concentration gradient between the water and the blood . The concentration of oxygen is always higher in the higher than in the blood.
7 of 10
What's the path of oxygen in the trachae system in insects?
The oxygen enters through the spirackes on the surface, travels down the concentration gradient into the trachae. The trachae then branch off into tracheoles which have thin permeable walls. The oxygen then diffuses out into individual cells.
8 of 10
What's the path of carbon dioxide in the trachae system in insects?
Carbon dioxide travels down its own concentration gradient, from the trachaeoles into the spirackes and is released in the atmosphere
9 of 10
How is the air movement controlled in the insect?
By rhythmic abdominal movements
10 of 10

Other cards in this set

Card 2

Front

They increase the surface area for gas exchange

Back

What do the gills do?

Card 3

Front

Thin plates they make up the gills

Back

Preview of the back of card 3

Card 4

Front

Small projections covering the gills to increase surface area

Back

Preview of the back of card 4

Card 5

Front

They have lots of blood cappillaries which are one cell thick to allow a shorter diffusion distance

Back

Preview of the back of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Exchange and transport systems resources »