Question

Differentiate between the following pair of terms <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> [Review Questions1 - Pg No. 63 ]

1. Pulmonary artery and pulmonary vein.
2. Vena cava and aorta.
3. Platelets and WBC.
4. RBC and WBC

Answer 1

Answer:
(a) Pulmonary artery and pulmonary vein.

Pulmonary artery	Pulmonary vein
1. This involves circulation of blood from the heart to the lungs.	1. This involves circulation of blood to the heart from the lungs.
2. It carries deoxygenated blood.	2. It carries oxygenated blood.

(b) Vena cava and Aorta

Vena Cava	Aorta
1. Vena Cava is a large vein.	1. Aorta is the large artery.
2. It carries deoxygenated blood from the upper and lower parts of the body i.e. head and shoulders.	2. It carries oxygenated blood to all parts of the body through its branches.

Blood platelets and blood group.

Platelets	WBC
1. These are colourless, oval or round, cytoplasmic fragments	1. WBC are colorless and lack hemoglobin, larger in quantity, and have distinct oval and lobed nuclei.
2. These play a major role in blood clotting.	2. They prevent the body from disease-causing germs by providing immunity
3. Their life span is 3-5 days and it is called thrombocytes.	3. Their life span is short i.e. 5 to 20 days.

(d) RBC and WBC

RBC	WBC
1. They do not have a nucleus at maturity.	1. They have a large characteristic nucleus.
2. They possess hemoglobin and are red.	2. They are colourless as they have no pigment.
3. They help in the transport of respiratory gases.	3. They help in defence mechanisms.