Soc 15 The Structure Of The Heart Flashcards
3 main functions of cardiovascular system
Transports oxygen, Co2 and nutrients, helps blood clots, control body temp
Cardiovascular
To do with the heart, blood and blood vessels together
Vasodillation
When veins swell widening internal diameter of blood vessel to allow increased blood flow
Vaso construction
When veins shrink down; narrowing of internal diameter of the blood vessel to decrease blood flow
Cardio-respiratory system
The interaction of the heart amd lungs support oxygen to muscles during exercise
Vascular shunting
When your body makes the heart beat fastee and diverts blood away from the organs to the body
Arteries 4 characteristics
Take away blood from the heart, thick more elastic walls as they carry high oressure blood, the channel the blood flows through can widen to allow more blood through, carries depxygenated blood
4 characterstics of veins
Carry blood into heart, thinner walls, many valves helps deoxygenated blood flow to heart, carrys oxygenated blood
4 characterstics of capilleries
Capillaries
4 main characteristic…
• Capillaries are microscopic vessels - just one cell thick
• Atone end, capillaries carry oxygenated blood which transfers oxygen and
nutrients to the muscles
• At the other end, they carry deoxygenated blood into the veins, picking up waste
products and taking them around the body to dispose of them
• Capillaries are where gaseous exchange takes place
What is the role of the pulmonary vein?
Brings oxygenated blood from lungs to heart
What is the role of the pulmonary vein
Bring deoxygenated blood to lungs
What is the role of the vena cava
Bring deoxygenated blood from body to heart
What is the role of the aorta
Bring oxygenated blood to the body
Red blood cells
Transport oxygen from lungs to the body’s cells and carbon dioxide from the cells to the lungs
Contain haemoglobin
Important for long distance runner
Structure of blood
Plasma, platelets, red blood cells, white blood cells