Soc 15 Structure Of Heart Flashcards
Vasodilation
When blood vessels widen to allow for increased bloodflow
Vasoconstriction
This is where veins shrink to preserve warmth inside the body and constrict bloodflow around the bodh
Cardio vascular:
To do with the heart (cardio) and the blood vessels (vascular’)
Cardio respiratory system
The interaction of the heart and lungs to supply oxygen to muscles during exercise.
Vascular shunting
Process that diverts blood flow to active areas from inactive areas and vital organs to make blood flow and delivery of both oxygen and nutirents to muscles more efficient. This is achieved through vasodilation and vasoconstriction.
What rythm does the heart beat in?
Lub dub rhythm
What is the First phase
First phase is the systolic phase
What happens in the systolic phase.
This is where blood is pumped from both atria into the venticles
What is the dub in the ‘lub dub” rythm
This is where both ventricles contract (dub)
What happens after the dub beat?
Deoxygenated blood is pumped out of the right ventricle to the lungs via the pulmonary artery.
Also, oxygenated blood leaves the left ventricle towards the working muscles through the aorta.
What is the second phase?
The diastolic phase
What happens in the diastolic phase?
This is when the heart is relaxing and refilling with the atria with blood.
What is blood pressure?
It is the measure of the force your heart uses to pumo blood around the body
Red blood cells?
They transport oxygen. Their haemoglobin and bioconcave shape maximise the amount of oxygen they can carry. They are important for any events which work aerobicslly to deliver oxygen to the working muscles.
White blood cells?
They fight infection and disease and produce antibodies.
