Level: JHS, Basic 9 | Subject: Integrated Science | Strand: Systems | Topic: The Heart, Blood Vessels and Circulation
Read the summary notes first: Basic 9 Integrated Science Summary Notes: The Heart and Blood Circulation
Test Yourself: 20 Objective Questions
Tick one answer for each question, then press Review answer. If your answer is wrong, it will be marked first, then the correct answer will show in green.
Essay Questions
- Describe the structure of the human heart. You may refer to a labelled drawing. (6 marks)
- Trace the path of blood in the pulmonary circulation, starting from the right ventricle and ending in the left atrium. (6 marks)
- State three differences between arteries and veins. (6 marks)
- State four functions of the circulatory system. (4 marks)
- Give four ways by which a person can keep the heart healthy. (4 marks)
Essay Questions: Marking Guide for Teachers and Parents
- (6 marks) The heart is a muscular organ in the chest between the lungs (1). It has four chambers: two upper atria and two lower ventricles (2, award 1 if only partly named). The left ventricle has the thickest wall because it pumps blood to the whole body (1). The septum separates the left and right sides (1). Valves make blood flow in one direction (1).
- (6 marks) Right ventricle pumps oxygen-poor blood (1) into the pulmonary artery (1). The blood goes to the lungs (1), where it gives out carbon dioxide and picks up oxygen (1). It returns through the pulmonary vein (1) to the left atrium (1).
- (6 marks) Any three differences, 2 marks each. Arteries carry blood away from the heart, veins carry blood back to it. Arteries have thick, elastic walls but veins have thinner walls. Arteries have a narrow space and veins a wide space. Veins have valves but arteries do not. Blood in arteries is under high pressure and a pulse can be felt, but veins have low pressure.
- (4 marks, 1 each) Transports oxygen to cells; carries digested food to cells; carries carbon dioxide and other wastes away; carries hormones; carries heat around the body; helps to fight disease.
- (4 marks, 1 each) Exercise regularly; eat less salt, fat and sugar and more fruits and vegetables; avoid smoking and too much alcohol; keep a healthy weight; check blood pressure.
Education Always (education.inspiringalways.com). Original practice questions, not official WAEC or BECE questions.