D. Answer the following.
1. Name the components of the circulatory system.
2. What are the types of blood groups? What is blood transfusion?
3. What is heartbeat and how can it be measured?
4. What is blood pressure and how is it expressed?
5. Mention two ways to keep the heart healthy.
Answers
Answer-:1---The circulatory system consists of four major components-
-The Heart: About the size of two adult hands held together, the heart rests near the center of the chest.
-Arteries: Arteries carry oxygen-rich blood away from the heart and where it needs to go.
-Veins: Veins carry deoxygenated blood to the heart where it is directed to the lungs to receive oxygen.
-Blood: Blood is the transport media of nearly everything within the body.
Answer 2---There are many blood groups in the human population including ABO, Rh, Kidd, Kell, Duffy, MNS and Lewis. The most important of these are ABO and RhD. Transfusion with ABO incompatible blood can lead to severe and potentially fatal transfusion reactions.
Answer---3 A heartbeat is a two-part pumping action that takes about a second. it can be measured by ECG(electrocardiography) orEKG.
Answer---4 Blood pressure is usually expressed in terms of the systolic pressure (maximum pressure during one heartbeat) over diastolic pressure (minimum pressure between two heartbeats) in the cardiac cycle.
Answer---5 the two ways to keep the heart healthy are-
-Quit smoking and stay away from secondhand smoke.
-Control your cholesterol and blood pressure.
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Answer:
1 The circulatory system consists of three independent systems that work together: the heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal vessels (systemic). The system is responsible for the flow of blood, nutrients, oxygen and other gases, and as well as hormones to and from cells.
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