Human Circulatory System

Q.

Match the following :

Column I Column II

(i) Fibrous pericardium a. Decreases friction created during the beating of heart

(ii) Visceral pericardium b. Anchors the heart.

(iii) Pericardial fluid c. Helps in the contraction of heart.

(iv) Myocardium d. Protects the cardiac muscle.

1. 

2. 

3. 

4. 

Q.

Pacemaker is

1. AV node

2. Ventricular muscles

3. Bundle of His

4. SA node

Q.

Match the following:

Column I	Column II
i. Fibrous pericardium	a. Decreases the friction created during beating of heart
ii. Visceral pericardium	b. Anchors the heart
iii. Pericardial fluid	c. Helps in contraction of heart
iv. Myocardium	d. Protects the cardiac muscle

1. (i) - a (ii) - b (iii) - c (iv) - d

2. (i) - d (ii) - c (iii) - b (iv) - a

3. (i) - c (ii) - d (iii) - a (iv) - b

4. (i) - b (ii) - d (iii) - a (iv) - c

Q.

how is coagulation harmful to humans?

Q.

Sino-atrialnode is called the pacemaker of our heart. Why?

Q. Choose the correct option which properly represents pulmonary circulation in humans.

1. Right Ventricle $\underset{\text{Blood}}{\overset{\text{Deoxygenated}}{\to }}$ Lungs $\underset{\text{Blood}}{\overset{\text{Oxygenated}}{\to }}$ Left Auricle
2. Right Ventricle $\underset{\text{Blood}}{\overset{\text{Oxygenated}}{\to }}$ Lungs $\underset{\text{Blood}}{\overset{\text{Deoxygenated}}{\to }}$ Left Auricle
3. Left Auricle $\underset{\text{Blood}}{\overset{\text{Oxygenated}}{\to }}$ Lungs $\underset{\text{Blood}}{\overset{\text{Deoxygenated}}{\to }}$ Right Ventricle
4. Left Auricle $\underset{\text{Blood}}{\overset{\text{Deoxygenated}}{\to }}$ Lungs $\underset{\text{Blood}}{\overset{\text{Oxygenated}}{\to }}$ Right Ventricle

Q.

Identify the icons labelled 1 - 6 in the sequence of blood circulation

1. 1- Right atrium 2- Right ventricle 3- Pulmonary artery 4- Lungs 5- Left atrium 6-Left ventricle

2. 1- Left ventricle 2- Left atrium 3- Pulmonary artery 4- Right atrium 5- Right ventricle 6- Lungs

3. 1- Lungs 2- Right atrium 3- Pulmonary artery 4- Right ventricle 5- Lungs 6- Right atrium

4. 1- Right atrium 2- Pulmonary artery 3- Right ventricle 4- Lungs 5- Right atrium 6- Lungs