Human Heart

Q. Explain lymph and its functions in a simple manner.

Q.

What is the composition and function of lymph?

Q.

Which of these shows the correct order in which blood flows through the blood vessels:

1. Vein, venules, capillaries, arterioles, artery

2. Artery, arterioles, capillaries, venules, veins

3. Artery, capillaries, arterioles, veins, venules

4. Artery, veins, capillaries, venules, arterioles

Q.

Why arteries don't have valve but veins do ?

Q.

Fill in the blanks of the following paragraph using just two words – arteries and veins

___(a)___ carry oxygen-rich blood from the heart to all parts of the body and ___ (b)___ carry carbon dioxide-rich blood from all parts of the body back to the heart. ___ (c)___ have thin walls and ___ (d)___ have thick elastic walls. Blood flows at high pressure in ___ (e)___. Valves are present in ___ (f) ___ which allow blood to flow only towards the heart. ___ (g)___ divide into smaller vessels. These vessels further divide into extremely thin tubes called capillaries. The capillaries join up to form ___ (h)___.

Q.

Why is the wall of right ventricle thinner than left ventricle?

1. Due to presence of valves within chambers

2. Due to higher pressure with which blood is pumped into arteries

3. Due to presence of deoxygenated blood

4. Due to presence of oxygenated blood

Q.

Blood vessel carrying the highest concentration of oxygen.

1. Pulmonary artery

2. Pulmonary vein

3. Inferior vena cava

4. Superior vena cava

Q. Give the differences between artery and vein(5 points)

Q.

Why does the SA node act as a pacemaker of the heart?

Q.

Name the three types of blood vessels. Also, write their functions. [3 MARKS]

Q.

What is the transverse thoracic plane?

Q.

Defaecation is not excretion. Explain.

Q.

The left ventricle of heart pumps blood into:

1. Vena cava

2. Pulmonary arteries

3. Pulmonary veins

4. Aorta

Q.

What is the colour of lymph?

Q.

Why veins have thin walls?

Q.

Which is the smallest vein in the human body?

Q.

The blood leaving the tissues becomes richer in

1. carbon dioxide

2. water

3. heamoglobin

4. oxygen

Q.

Pulmonary veins carry oxygen rich blood.

1. True

2. False

Q.

Carbon dioxide-rich blood is present in:

1. I and III

2. II and III

3. III

4. I and IV

Q.

The veins from head, neck and arms drain into ___

1. Pulmonary artery

2. Aorta

3. Superior vena cava

4. Pulmonary vein

Q. In the diagram of human heart, certain parts have been identified by alphabets. Choose the correct set which matches the parts.

1. A- Inferior venacava, B- Superior venacava, C- Right atrium , D- Left ventricle , E- Pulmonary veins
2. A- Superior venacava, B- Inferior venacava, C- Right atrium, D- Right ventricle, E- Pulmonary artery
3. A- Aorta, B- Superior venacava, C-Left atrium , D- Left ventricle , E- Pulmonary veins
4. A- Superior venacava, B- Inferior venacava, C- Right atrium , D- Left ventricle , E- Pulmonary veins

Q. Which is the first chamber of the heart to receive oxygenated blood?

1. Left atrium
2. Left ventricle
3. Right ventricle
4. Right atrium

Q.

Write the function of:

(i) Coronary artery

Q.

Why is circulation of blood necessary? [1 MARK]

Q.

In mammals, veins differs from arteries in having

Q.

Name the vein which brings blood to left atrium from lungs.

__

Q. Explain the conduction of the heartbeat.

[Review question: Pg. No: 215]

Q.

How does blood flow in the heart?

Q. Why there are 3 chordae tendinae in left ventricle and 2 chordae tendinae in right ventricle

Q.

Name the major veins which pour blood into the right atrium.