1 Name the instrument used to measure the blood pressure. What is the normal blood pressure?
2. What type of transport system is present in the bodies of insects?
3. How is the food transported in plants?
4. What is the relationship between the heart beat and the pulse rate?
5. Differentiate between arteries and veins.
6. Explain the process of blood coagulation?
7. What is lymph? How is the composition of lymph different from
blood?
8. Given diagram shows an experimental setup to study a particular
process. Answer the questions given below.
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Answers
Answer:
1) sphygmomanometer is used to measure blood pressure.A normal blood pressure level is less than 120/80 mmHg.
2)Insects, like all other arthropods, have an open circulatory system which differs in both structure and function from the closed circulatory system found in humans and other vertebrates. In a closed system, blood is always contained within vessels (arteries, veins, capillaries, or the heart itself). In an open system, blood (usually called hemolymph) spends much of its time flowing freely within body cavities where it makes direct contact with all internal tissues and organs.
3)The transport of food in plants is called translocation. It takes place with the help of a conducting tissue called phloem. Phloem transports glucose, amino acids and other substances from leaves to root, shoot, fruits and seeds.
4)Since each pulse is produced after the systole of the left ventricle, each cardiac cycle generates one pulse. Therefore, each heartbeat gives rise to one pulse. So, the pulse rate is mostly the same as the heart rate.
5) Arteries
1. They carry blood away from the heart to various parts/organs of the body.
2. Blood flows under great pressure.
3. They are thick walled.
4. Arteries branch into arterioles and further into fine capillaries.
Veins
1. The carry blood towards the heart from various parts /organs of the body.
2. Blood flows under less pressure.
3. They are thin walled.
4. Venules are small vessels that continue from capillaries and merge to form veins.
6)Blood coagulation is a process that changes circulating substances within the blood into an insoluble gel. The gel plugs leaks in blood vessels and stops the loss of blood. The process requires coagulation factors, calcium and phospholipids. The coagulation factors (proteins) are manufactured by the liver.
7)Lymph is the fluid that flows through the lymphatic system.
Blood has RBC's, WBC's, platelets and a fluid called plasma. Whereas lymph has WBC's and watery fluid. They both have immune and also circulatory functions in them. ... Composition: It is majorly composed of blood cells, which are RBC's and WBC's suspended in plasma.
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