Identify the given figure and select the correct option 

1. Neutrophil - phagocytic cell which destroy foreign organisms entering the body

2. Eosinophil - their number increases during allergic infection

3. Lymphocyte - small sized non-motile and non-phagocytic

4. Monocyte - motile and phagocytic in nature

The given figure shows schematic plan of blood circulation in humans with labels A to D. Identify the labels along with their functions and select the correct option.

1. C - Vena Cava - takes blood from body parts to right atrium, P_CO2 = 45 mm Hg

2. D - Dorsal aorta - takes blood from heart to body parts, P_O2 = 95 mm Hg

3. A - Pulmonary vein - takes impure blood from body parts to heart, P_O2 = 60 mm Hg

4. B - Pulmonary artery - takes blood from heart to lungs, P_O2 = 90 mm Hg.

Haemoglobin is

1. an oxygen carrier in human blood

2. a protein used as food supplement

3. an oxygen scavenger in root nodules

4. a plant protein with high lysine content

Which of the following matches correctly?

Serum is-

1. Blood $minus$ corpuscles

2. (Blood $minus$ corpuscles) $minus$ clotting factors

3. Plasma minus clotting factors

4. Both (2) and (3)

Match the following:

1. (i) → r, (ii) → p, (iii) → q

2. (i) → p, (ii) → r, (iii) → q

3. (i) → q, (ii) → p, (iii) → r

4. (i) → r, (ii) → q, (iii) → p

Which of the following are not correct:

(i) Spleen is the graveyard for RBC

(ii) All the mammals have biconcave RBCs

(iii) Clotting factors present in plasma are in active form.

(iv) All the substances released by platelets are involved in clotting only.

1. (i), (iii), (iv)

2. (ii), (iii), (iv)

3. (i), (ii), (iii), (iv)

4. (ii), (iii)

In open circulatory system, blood is pumped through

1. Sinuses to large vessels

2. Large vessels to sinuses

3. Cavities to organs

4. Spaces to large vessels

Consider the following statement with respect to heart:

(i) It has the double walled membranous bag.

(ii) Human heart has four chambers: two larger atria and two median ventricles.

(iii) Human heart is mesodermal in origin and is situated in abdominal cavity.

(iv) There is no clear separation between atria and ventricles.

How many of the statements given above are correct?

1. 2

2. 3

3. 1

4. all are wrong

Which one is incorrect in the following:

1. Inter atrial septa – thin and muscular

2. Atrio– ventricular septa – thick and fibrous

3. Inter ventricular septa – thick and muscular

4. Pericardium – muscular