Q.14:- Draw a standard ECG and explain the different segments in it.   Answer:- Each peak in the ECG is identified with a letter from P to T (PQSRT) which corresponds…

Q.13:- Explain heart sounds.   Answer:- The beating of heart produces characteristic sounds which can be heard by using stethoscope. In a normal person, two sounds are produced per heart…

Q.12:- Define a cardiac cycle and the cardiac output.   Answer:-    The sequential events in the heart which are repeated cyclically is called cardiac cycle and it consists of systole…

Q.11:- What is the significance of atrio-ventricular node and atrio-ventricular bundle in the functioning of heart?   Answer:-  AV Node and AV Bundles are responsible for conduction of heart beat to…

Q.10:- Sino-atrial node is called the pacemaker of our heart. Why?   Answer:-  Sino-atrial node (SAN) is a mass of neuromuscular tissue which lies in the wall of right atrium. It…

Q.9:- Why do we call our heart myogenic?   Answer:- The heart of molluscs and vertebrates including humans is myogenic. It means heart beat is initiated in heart itself by a…

Q.8:- Describe the evolutionary change in the pattern of heart among the vertebrates.   Answer:-  Vertebrates have a single heart. It is a hollow, muscular organ composed of cardiac muscle fibres….

Q.7:- 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   Answer:-  (a) Blood and Lymph Lymph…

Q.6:- What is meant by double circulation? What is its significance?   Answer:-  The type of blood circulation in which oxygenated blood and deoxygenated blood do not get mixed is termed…

Q.5:- What is the difference between lymph and blood?   Answer:-  Lymph Blood It is red-coloured fluid It is a colourless fluid. It contains plasma and lesser number of WBCs and…