Lifestyle, health and risk
- Created by: hello1112
- Created on: 03-01-17 14:51
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- Lifestyle, health and risk
- Open circulatory system
- insects
- Blood circulates in larges open spaces
- A simple heart pumps blood in to cavities surrounding organs
- Closed circulatory system
- All vertebrates
- Blood travels in tubes
- =Higher blood pressure = more efficient
- Single circulatory system
- Fish
- Heart > Gills > body
- Double circulatory system
- Mammels & birds
- Heart > Lungs > heart > body
- Structure of the heart
- Diagram
- Blood vessels
- Closed circulatory system
- All vertebrates
- Blood travels in tubes
- =Higher blood pressure = more efficient
- Single circulatory system
- Fish
- Heart > Gills > body
- Double circulatory system
- Mammels & birds
- Heart > Lungs > heart > body
- Arteries
- Well defined, round lumen
- Elastic, stretchy structre
- Withstand high blood pressure
- elastic recoil
- Carry blood awy from the heart
- Veins
- Less elastic muscle tissue
- One way valves
- Larger, less defined lumen
- Low blood pressure
- Carries blood to th heart
- Capillaries
- One blood cell thick
- exchange of materials betwean the body cells and blood
- Closed circulatory system
- The cardiac cycle
- Cardiac diastole > atrial systole > ventricular systole
- Blood pressure
- Hypertension = elevated blood pressure
- one of the most common factors of Cardiovascular disease.
- Measure of hydrostatic force of blood against the wall of a blood vessel.
- Systolic = hearts contracted, Diastolic = hearts relaxed
- Systolic / Diastolic
- Spygmomanometer - device used to measure blood pressure
- Measured in mmHg = millimetres of mercury
- Systolic / Diastolic
- Measured in mmHg = millimetres of mercury
- Hypertension = elevated blood pressure
- Studies
- Cohort study
- Follow lots of people over time to see who develops the disease and who does not.
- Case controlled study
- A group who have the disease are compared with a group who don't.
- Cohort study
- Carbohydrates
- 'hydrated carbon'
- Carbon can bond with itself to form chains.
- Saccharides end in -ose, glucOSE, all saccharides are sugars.
- Carbon can bond with itself to form chains.
- monosaccharides = 1 sugar unit
- Condensation reaction
- Makes glycosidic bonds
- Disaccharide = 2 sugar units
- Condensation reaction
- Polysaccharide = 3 or more sugar units
- Condensation reaction
- Disaccharide = 2 sugar units
- Makes glycosidic bonds
- Condensation reaction
- Hydration reaction
- Breaks glyosidic bonds
- 'hydrated carbon'
- Water
- 2 hydrogen atoms covalently bonded to an oxygen atom.
- Has a high cohesion because of hydrogen bonding
- This gives water a high surface tension allowing small organisms to walk on it.
- Open circulatory system
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