Diagram 1 shows a section through the heart. Diagram 14. (a) Use words from the box to name the structures labelled A and B on Diagram 1.aortaatrium pulmonary artery ventricle A ___________________________________________________________ B ___________________________________________________________ (2) (b) The tissue in the wall of the heart contracts. (i) What type of tissue is this? Tick ( ) one box. muscular glandular epithelial (1) (ii) What does the heart do when this tissue contracts? ______________________________________________________________ ______________________________________________________________ (1) Page 8 of 19(c) Draw arrows on Diagram 2 to complete the route taken by deoxygenated blood through the heart. Diagram 2(2) (d) The graph shows the percentage (%) of adults in the UK who have coronary heart disease.Age group (i) Look at the graph. Which group of people is most at risk of having coronary heart disease in the UK? ______________________________________________________________ (2) Page 9 of 19(ii) Explain what happens to the heart in coronary heart disease. ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ (3)
Question
Diagram 1 shows a section through the heart. Diagram 14. (a) Use words from the box to name the structures labelled A and B on Diagram 1.aortaatrium pulmonary artery ventricle A ___________________________________________________________ B ___________________________________________________________ (2) (b) The tissue in the wall of the heart contracts. (i) What type of tissue is this? Tick ( ) one box. muscular glandular epithelial (1) (ii) What does the heart do when this tissue contracts? ______________________________________________________________ ______________________________________________________________ (1) Page 8 of 19(c) Draw arrows on Diagram 2 to complete the route taken by deoxygenated blood through the heart. Diagram 2(2) (d) The graph shows the percentage (%) of adults in the UK who have coronary heart disease.Age group (i) Look at the graph. Which group of people is most at risk of having coronary heart disease in the UK? ______________________________________________________________ (2) Page 9 of 19(ii) Explain what happens to the heart in coronary heart disease. ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ (3)
Solution
The question seems to be incomplete and a bit confusing. However, I'll try to answer based on the information provided.
(a) Without the diagram, it's hard to identify structures A and B. However, in a typical heart diagram, A could be the atrium and B could be the ventricle.
(b) (i) The type of tissue in the wall of the heart that contracts is muscular tissue.
(ii) When this tissue contracts, it pumps blood throughout the body. This process is known as the heartbeat.
(c) Without Diagram 2, it's impossible to draw arrows to show the route of deoxygenated blood. However, deoxygenated blood typically flows from the body into the right atrium, then into the right ventricle, and then it's pumped to the lungs via the pulmonary artery.
(d) (i) Without the graph, it's impossible to determine which group is most at risk of coronary heart disease in the UK.
(ii) In coronary heart disease, the coronary arteries (which supply blood to the heart muscle) become narrowed by a buildup of fatty material within their walls. This condition is called atherosclerosis. The narrowing can reduce blood flow to the heart muscle and cause chest pain known as angina. If a coronary artery becomes completely blocked, it can cause a heart attack.
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