Soc 15 Flashcards
(18 cards)
What makes up the cardiovascular system
Formed by our heart and blood vessels
Cardio
means heart
Vascular
Means Blood Vessels
Three main functions of the cardiovascular system
Transports Oxygen
Clots Blood
Controls body’s temperature
Clot Blood
Blood contains platelets which help clots our blood and form scabs which help stop bleeding and healing. In some sports small are common and so this is important.
Controls the body’s temperature
If you get too hot the blood vessels close to the skin get bigger (vasodilation). Blood is diverted to the surface to allow more heat to radiate out. If you become too cold your vessels get smaller (vasoconstriction) to avoid heat being lost.
What is vasodilation
If you get too hot the blood vessels close to the skin get bigger
vasoconstriction
If you become too cold your vessels get smaller to avoid heat being lost.
Cardiovascular fitness
The ability to exercise the whole body for long periods of time
Vascular shunting
Process that increases blood flow to active areas during exercise by diverting blood away from inactive areas; achieved by vasodilation and vasoconstriction.
Adrenaline
To bring about a change in your heart rate, your body releases a hormone called adrenaline. It makes the heart beat faster and diverts blood away from the organs and to the muscles (vascular shunting).
Cardio-respiratory system
The interaction of the heart and lungs to supply oxygen to muscles during exercise
Cardiovascular
To do with the heart, blood and blood vessels together.
What do Arteries have
Thick walls and are more elastic than veins as they carry
blood which is at a higher pressure than veins as they carry oxygenated
blood
Function of Arteries
They take blood away from the heart
What is a special type of artery
The pulmonary artery is different from other arteries as it carries deoxygenated blood from the heart to the lungs
Function of Veins
They carry blood into the heart
What do veins have
They have much thinner walls, are less elastic and carry blood at a lower
pressure