Systems of transport within bodies Circulation Hannah Nevins Bio 1b Spring 2009.
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Transcript of Systems of transport within bodies Circulation Hannah Nevins Bio 1b Spring 2009.
- Slide 1
- Systems of transport within bodies Circulation Hannah Nevins Bio 1b Spring 2009
- Slide 2
- Transportation to and from cells Nutrients e.g. fatty acids, glucose Metabolites wastes Hormones signaling cells, organs Gases O2, CO2 How are gases carried?
- Slide 3
- Circulatory System Components: Circulatory fluid carry solutes, gases, immune cells, RBCs Vessels roads for transport Pump to move fluid Valves to keep flow unidirectional (why?)
- Slide 4
- Cell Types: Red & White
- Slide 5
- Components of (vertebrate) blood
- Slide 6
- Simple Circulation: Ciliated Systems Bodies
- Amphibians & some Reptiles Two atria & 1 ventricle Blood mixed in ventricle Greater systemic pressure = > higher activity levels Heart gets fresher blood -Which of these has a greater density of skin capillaries? Why?
- Slide 16
- Variations in the circulatory system:
- Slide 17
- Four-chamber heart: Crocodiles, Birds and Mammals No mixing of oxygenated and deoxygenated blood What is the advantage of this?
- Slide 18
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- Human Circulation:
- Slide 21
- Capillaries are everywhere! 2000/ mm2, usually