Solution of Chapter 18. Body Fluids and Circulation (Biology NCERT Book)

1 Name the components of the formed elements in the blood and mention one major function of each of them.

2 What is the importance of plasma proteins?

3 Why do we consider blood as a connective tissue?

4 What is the difference between lymph and blood?

5 What is meant by double circulation? What is its significance?

6 Write the differences between:  (a) Blood and Lymph(b) Open and Closed system of circulation(c) Systole and Diastole(d) P-wave and T-wave 

7 Describe the evolutionary change in the pattern of heart among the vertebrates.

8 Why do we call our heart myogenic?

9 Sino-atrial node is called the pacemaker of our heart. Why?

10 What is the significance of atrio-ventricular node and atrio-ventricular bundle in the functioning of heart?

11 Define a cardiac cycle and the cardiac output.

12 Explain heart sounds.

13 Draw a standard ECG and explain the different segments in it.