The circulatory system part 1
- Created by: hannahbot123
- Created on: 04-03-15 14:39
View mindmap
- The Circulatory System
- Diffusion in single-celled organisms
- Small organisms such as amoebae do not need a circulatory system.
- They have a large surface area compared to their volume.
- They are surrounded by the water they live in. Dissolved oxygen diffuses from this water into the cell through the cell membrane.
- Waste material diffuses out of the cell. There is no need for special transport system.
- Small organisms such as amoebae do not need a circulatory system.
- Artificial Blood
- If people have lost a lot of blood, or have problems with their blood, doctors may infuse their blood with extra 'artificial blood'.
- Various artificial blood products are available, but none contain red or white cells or platelets, so they are really substitutes for blood rather than artificial blood.
- Some are for increasing the blood volume, and some are for carrying oxygen.
- The human Transport system
- The blood is your main transport system.
- It takes oxygen and nutrients, such a sglucose and amino acids, to cells.
- It collects and removes waste, such as urea and carbon dioxide, from cells.
- Diffusion in single-celled organisms
Similar Biology resources:
Teacher recommended
Comments
No comments have yet been made