Session 3 - Cardiovascular System and Oedema Flashcards
What is the pulmonary circulation?
Where blood circulates from the heart to the lungs
What is systemic circulation?
Where blood travels from the heart to the rest of the body.
What is an end artery?
An artery that is the only supply of oxygenated blood to a tissue
What happens to correct blocked end arteries?
Collateral circulation is established
What happens in systole?
The left ventricle contracts and so blood pressure increases in the aorta
What happens to the aorta during dystole?
Recoils maintaining the pressure of the blood
What are the 3 layers of arteries?
Tunica intima (endothelium), Tunis media (smooth muscle and elastic fibres), tunica adventitia (collagen, elastic fibres and CT)
What is an aneurysm?
Dilation of blood vessels
What are pericytes?
Cells that line capillaries and venuoles which are capable of dividing into muscle cells or fibroblasts
What are capacitance vessels?
Vessels that are able to increase the volume of blood they hold without increasing pressure
What actions allow blood to be returned to the heart through veins?
Pressure changes in the thorax, contractions of skeletal muscle, valves
What does the frank sterling curve state?
The more that goes into the heart, the more that comes out
How do diuretics decrease blood pressure
As you lose more water in your urine, therefore less is reabsorbed to go into the blood so you have a smaller blood volume giving a lower pressure
What is paroxysmal nocturnal dyspnoea?
Difficulty in breathing at night
What is orthopnea?
Breathlessness
