Soc 16:the Structure Of Blood Vessels

Question 1

Arteries 4 main characteristics

Answer 1

• Arteries take blood away from the heart
• 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
• The channel the blood flows through, called the lumen, can widen to low more blood through when you so that when you exercise, it can reach the working muscles
●The pulmonary artery is different from other arteries as it carries deoxygenated blood from the heart to the lungs

Question 2

What is the 4 main characteristics of the veins

Answer 2

• Veins carry blood into the heart
• Veins have much thinner walls, are less elastic and carry blood at a lower pressure
• Veins contain many valves which helps deoxygenated blood flow to the heart
• The pulmonary vein is different to other veins as it carries oxygenated blood from the lungs back to the heart

Question 3

4 main characteristics of the capillaries

Answer 3

● Capillaries are microscopic vessels - just one cell thick
● At one 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

Question 4

What is the role of the vena cava

Answer 4

Carries oxygen depleted blood back to your heart from the lower part of your body

Question 5

What is the role of the right atrium

Answer 5

It receives oxygen-poor blood from the body and pumps it to the right venricle

Question 6

What is the role of the tricuspid valve

Answer 6

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