Flashcards
AQA biology 13.5 circulatory system of a mammal
Cards in this deck (16)
- 1why to larger organisms need a transport system?surface area to volume ratio decreases so gas cant be diffused in any longer, there has to be a system.
- 2what determines whether there is a specialised system?-SA:V
-how active the organism is - 3what features give the greatest need for a specialised transport system?lower SA:V ratio and active e.g. a mouse
- 4what are 6 features of transport systems?-suitable medium to carry materials (blood)
-form of mass transport
-closed system
-mechanism to move the medium (heart or evaporation in plants)
-way to keep flow one way (valves)
-controlling flow to suit changing needs - 5what are the three types of blood vessel?arteries
veins
capillaries - 6which vessel takes blood from the right ventricle to the lungs?pulmonary artery
- 7which vessel takes blood from the lungs to the left atrium?pulmonary vien
- 8which vein takes de-oxygenated blood into the right atrium?vena cava
- 9which artery takes oxygenated blood from the left ventricle to the rest of the body?the aorta
- 10which artery takes blood to the kidneys?renal artery
- 11which artery supplies the liver?hepatic artery
- 12which vessel takes blood from the stomach and intestines to the liver?hepatic portal vein
- 13Which vessel takes blood from the kidney to join the vena cava?renal vein
- 14which blood vessel goes from the liver to join the vena cava?hepatic vein
- 15A transport system moves substances long distances. how are these substances then moved into the cells?diffusion
- 16what 3 things make the diffusion of substances into cells rapid?-large surface area
-across short distances
-steep diffusion gradient
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- AS - Level AS Biology (unit 2 - 13. exchange and transport) Flashcards on AQA biology 13.5 circulatory system of a mammal, created by Charlotte Hewson on 14/03/2015.
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- Charlotte Hewson
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