Heart + Circulation Flashcards
Function of artery
Vessel carries oxygenated blood away from heart
Function of vein
Vessel carries deoxygenated blood towards the heart
Pulmonary artery
Carries carries oxygenated blood towards the lungs
Pulmonary vein
Carries deoxygenated blood away from the lungs towards the heart
Aorta
Carries oxygenated blood away from the heart towards the body
Vena cava
Carries deoxygenated blood away from body towards the heart
Coronary arteries
Branch off aorta and surround heart with as my oxygenated blood as it needs
Capillaries
Exchange materials at tissue
What is plasma
Fluid,
part of blood,
transports c02 hormones + waste
What is double circulatory system
Where blood is pumped from the heart to the lungs and body at the same time
Pacemaker
A group of cells in the right atrium which control the heart rate
Arteries have …
Thicker more muscular walls
Higher blood pressure
Have small passways for blood (internal lumen)
Veins have …
Thin less muscular walls
Larger passways for blood (internal lumen)
Have lower blood pressure
HAVE VALVES TO PREVENT BACK FLOW
What is coronary heart disease (6-8)
When coronary artery is blocked…
- less o2 and glucose reach the heart muscle
-heart will respire less
-heart tissue will die
-less oxygen pumped through body to other tissues
-respiration becomes anaerobic - lactic acid is produced
-less energy released
-part of blockage breaks off and clot can form
Treatment for heart disease…
- Diet/exercise (lose weight)
- Statins (blood thinners)(lower cholesterol)
- Stent (open arteries)
