1. Figure 1 shows a diagram of the heart. (a) (i) Draw arrows on Figure 1 to show how oxygenated blood moves through the heart. (ii) What happens when the right ventricle contracts? A valve T opens B valve T closes C blood is forced into the left atrium D blood is forced into the pulmonary vein (iii) Draw one straight line from each structure to its function. structure pulmonary vein function carries deoxygenated blood forces blood towards body organs carries blood from the lungs to the heart takes blood to the right side of the heart forces blood towards the lungs (b) Figure 2 shows a dissected vein. (i) Explain how the valves in veins help the blood, at low pressure, flow towards the heart. (ii) The equipment used to dissect the vein was cleaned and put into disinfectant. State why this equipment was put into disinfectant.

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1. Figure 1 shows a diagram of the heart - Edexcel - GCSE Biology - Question 1 - 2020 - Paper 1

Question 1

1. Figure 1 shows a diagram of the heart. (a) (i) Draw arrows on Figure 1 to show how oxygenated blood moves through the heart. (ii) What happens when the right ... show full transcript

Worked Solution & Example Answer:1. Figure 1 shows a diagram of the heart - Edexcel - GCSE Biology - Question 1 - 2020 - Paper 1

Step 1

Draw arrows on Figure 1 to show how oxygenated blood moves through the heart.

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Answer

Arrows should indicate the direction of oxygenated blood from the pulmonary vein to the left atrium, then to the left ventricle, and subsequently to the aorta.

Step 2

What happens when the right ventricle contracts?

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Answer

When the right ventricle contracts, valve T closes to prevent backflow, and blood is forced into the pulmonary artery.

Step 3

Draw one straight line from each structure to its function.

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Answer

pulmonary vein - carries blood from the lungs to the heart
left ventricle - forces blood towards body organs

Step 4

Explain how the valves in veins help the blood, at low pressure, flow towards the heart.

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Answer

The valves in veins close to prevent backflow, ensuring that blood flows in one direction towards the heart, even under low pressure conditions.

Step 5

State why this equipment was put into disinfectant.

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Answer

The equipment was put into disinfectant to kill bacteria, pathogens, or microorganisms.

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1. Figure 1 shows a diagram of the heart - Edexcel - GCSE Biology - Question 1 - 2020 - Paper 1

Worked Solution & Example Answer:1. Figure 1 shows a diagram of the heart - Edexcel - GCSE Biology - Question 1 - 2020 - Paper 1

Draw arrows on Figure 1 to show how oxygenated blood moves through the heart.

What happens when the right ventricle contracts?

Draw one straight line from each structure to its function.

Explain how the valves in veins help the blood, at low pressure, flow towards the heart.

State why this equipment was put into disinfectant.

Join the GCSE students using SimpleStudy...

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