Starter quiz
- Which of these is a waste product in humans?
- Amino acids
- Carbohydrates
- Carbon dioxide ✓
- Mineral ions
- Oxygen
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- Why is the heart described as an organ?
- It is made from cardiac muscle cells.
- It is part of an organ system.
- It acts as a pump pushing blood round the body.
- It is made from several different tissues. ✓
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- Nitrogenous waste produced by cells is transported by the blood to which organ?
- 'Kidney' ✓
In the diagram of the human heart, which letter (A, B, C or D) is the left ventricle?- 'C' ✓
- Starting with the lungs, put these structures in the correct order to describe blood flow through the left side of the heart.
- 1⇔Lungs
- 2⇔Pulmonary vein
- 3⇔Left atrium
- 4⇔Atrio-ventricular valve
- 5⇔Left ventricle
- 6⇔Aorta
- True or false? The pulmonary artery carries oxygenated blood.
- True
- False ✓
Exit quiz
- Match each word to its correct description.
- Artery⇔blood vessel that carries blood away from the heart ✓
- Capillary⇔where exchange of substances between blood and body cells takes place ✓
- Vein⇔blood vessel that carries blood towards the heart ✓
- Which substance in the list is not mainly transported in the blood plasma?
- Amino acids
- Carbon dioxide
- Glucose
- Oxygen ✓
- Urea
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- Which of the adaptations of a red blood cell increases the rate of diffusion of oxygen?
- Absence of a nucleus
- Biconcave shape ✓
- Presence of protein haemoglobin
- Presence of Fe ions
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- Blood vessels are adapted to their function. Which blood vessels are adapted by having thick elastic and muscular walls and narrow lumens?
- 'Arteries' ✓
- True or false? The exchange of substances between the blood and body cells only takes place from capillaries.
- True ✓
- False
- Some blood vessels contain valves. What is the function of these valves?
- To speed up blood flow.
- To slow blood flow.
- To push blood forward.
- To prevent back flow of blood. ✓
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Worksheet
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Lesson Details
Key learning points
- Blood contains blood cells suspended in a fluid called plasma.
- Red blood cells transport oxygen, and have a structure adapted to carry as much oxygen as possible.
- Plasma transports water, glucose and other nutrients, and waste products including carbon dioxide and urea.
- Arteries carry blood away from the heart; capillaries carry blood to/from cells; veins carry blood back to the heart.
- Arteries, capillaries and veins have structures adapted to their functions, including different vessel walls and valves.
Common misconception
The names of the blood vessels and their functions and adaptations are often confused. Students often forget or misunderstand red blood cell adaptations too.
Both these areas are covered in detail, with clear step-by-step information given and tasks to check learning and reinforce understanding.
Keywords
Red blood cell - A blood cell that uses haemoglobin to bind and transport oxygen.
Plasma - The fluid of the blood which carries blood cells and other substances.
Artery - Large blood vessels with thicker walls which transport blood away from the heart.
Vein - Large blood vessel which transports blood towards the heart.
Capillary - Narrow blood vessel which allows exchange of substances between tissue and blood.
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