Question

Match the statements in column A with those in column B:

Column 1	Column 2
Heart	Movement of materials
Food and oxygen	Channels for transport in man
Carrier of oxygen	A living pump
Circulation	Materials needed by every living being
Arteries and veins	Red blood cells.

Answer 1

A. Heart - III. A living pump

1. Heart is a muscular, pear-shaped organ situated on the left side of the chest cavity.
2. The main function of the heart is to pump blood through blood vessels to the various parts of the body.

B. Food and oxygen - IV. Materials needed by every living being

1. Food is a substance that is required as a fuel in the body for running various metabolic processes such as growth, development, etc.
2. Oxygen is necessary for the oxidation of this food into simple absorbable molecules for assimilation in order to get energy and nutrition.
3. Therefore, food and water are materials needed by every living being.

C. Carrier of oxygen - V. Red blood cells

1. Blood is composed of plasma and blood corpuscles.
2. Red blood cells are one of the blood corpuscles which is red in color due to the presence of hemoglobin.
3. Hemoglobin is an iron heme protein that binds to oxygen and brings about oxygen transportation.

D. Circulation - I. Movement of materials

1. Circulation system is a system that provides transportation of substances from one part of the body to another via blood.

E. Arteries and veins - II. Channels for transport in man

1. The blood pumped by the heart is carried out in a network of tubular structures known as blood vessels.
2. Arteries are the vessels that take away pure blood from the heart to the rest of the body.
3. Veins are the vessels that bring back impure blood from organs to the heart.
   

Column A	Column B
A. Heart	III. A living pump
B. Food and oxygen	IV. Materials needed by every living being
C. Carrier of oxygen	V. Red blood cells
D. Circulation	I. Movement of materials
E. Arteries and veins	II. Channels for transport in man