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How are red blood cells specialized to exchange gasses?
Gaseous excange takes place in the alveoli of the Lungs during respiration
Explain why large active organisms need special surface for exchange?
large organisms need larger area to exchange more substances.but large organisms have small surface area to volume ratio.this means that the surface is not large enough to enable gases and nutrients at the fast rate needed to keep all the cells alive.thus large organisms need special exchange surfaces to provide the body with the nutrients and gaseous exchange they require.
Which structure does gas exchange occur?
Initially within the alveoli inside the lungs; also between the body's tissue cells and blood
What is diffusion in cells?
diffusion- passive transport in cells where molecules move from an area where there are more molecules to an area of fewer molecules.
Why is a cell's size limited?
because the diffusion of a cell. and the volume surface area of the cell.
Exchange of gases and nutrients occurs by diffusion between the?
capillaries and tissue cells
How does oxygen get from the blood to the cell in the tissue?
diffusion from red blood cells in capillaries to the tissue cells
The gas exchange between the blood and the cells of the body is an example of?
Diffusion
What are the thin walled blood vessels that allow the exchange of gases and nutrients between the blood and cells?
Capillaries - The endometrium (epithelial lining/wall) of the capillaries is only one cell thick optimizing diffusion/osmosis between it and the tissue cells of the body
Where diffusion occur in living organisms?
Diffusion is one of the processes of transferring materials within the cells of living organisms. An example of diffusion is the exchange of gases in the lungs.
Capilaries excange oxygen and what in cells?
The capillaries exchange oxygen, nutrients, and waste in cells. They accomplish this via diffusion.
What happen in the capillaries?
Capillary exchange- exchange of gases- internal or tissue respiration
What three methods allow exchange of molecules between cells and their surroundings?
Diffusion- Osmosis Endocytosis
Exchange of nutrients and wastes with the body cells takes place by diffusion through the walls of?
artria
Method the circulatory system uses to move nutrients into cells?
diffusion using capillaries and tissue fluid
How are red blood cells specialized to exchange gasses?
Gaseous excange takes place in the alveoli of the Lungs during respiration
Why can epithelial cells survive without blood vessels?
They receive nourishment via diffusion of substances from nearby tissue.
