Soc 15/16: The Structure Of The Heart Flashcards
Cardio-respiratory system
The interaction of the heart and lungs to supply oxygen to muscles during excercise
Cardiovascular
To do with the heart, blood and blood vessels together
Vasodilation
When veins swell up or dilate; widening of the internal diameter (lumen) of the blood vessel to allow increased blood flow
Vasoconstriction
When veins shrink down; narrowing of the internal diameter (lumen) of the blood vessel to decrease blood flow
Arteries
Arteries go away from the heart
Have thick walls as it has alot of pressure wnd more elastoc then veins
Oxygenated blood
Veins
Go into the heart
Have much thinner walls and carry blood at lower pressure
Veins contain deoxygenated blood
Capillaries
Distribute blood within the organs
Where gaseous exchange take place
Microscopic vessels- just one cell thick
Vascular shunting
Process that increases blood flow to active areas during excercise by diverting blood away from inactive areas.
Achieved by vasodilation and vasoconstriction
Immune system
Structures and processes in your body that stop disease
Platelets
Substance involved in blood clotting
Serotonin
Hormone that triggers the clotting process
Plasma
The fluid part of the blood
Red blood cells
Transport oxygen from the lungs to the cells
Haemoglobin
A red protein in the blood that transports oxygen
Anaemia
A condition where there is a lack of red blood cells or haemoglobin in the blood
