Capillaries

Q.

What is the similarity between xylem of plants and arteries of humans?

1. Both xylem and arteries are deep seated

2. Both xylem and arteries carry vital fluids

3. Both xylem and arteries are thin walled

4. Choice A & B

5. Choice A & C

Q.

Very fine blood vessel known as ___ forms the junction between arteries and veins.

Q. Capillaries are the sites of the transfer of oxygen and other nutrients from the bloodstream to other tissues in the body.

1. True
2. False

Q.

William Harvey was the scientist who_______________.

Q.

The circulatory system is like a single direction highway.

1. True

2. False

Q. The thinnest blood vessels in the human body are

(a) arteries
(b) veins
(c) capillaries
(d) any of these

Q.

Capillaries connect veins and arteries.

1. True
2. False

Q.

Identify the option that has an incorrect statement.

1. Capillary beds ensure that diffusion happens efficiently

2. Arteries and veins are connected by capillaries

3. Capillaries are the site of diffusion of gases and nutrients

4. Arterioles are the largest arteries

Q. Does tracheae occur in humans also ?

Q. Question 2 (iii)
Fill in the blanks.
(iii) Arteries and veins are joined by a network of___

Q. The capillaries join up to form _____ which empty into the _____.

1. Arteries, Lungs
2. Veins, Heart
3. Veins, Lungs
4. Arteries, Heart

Q. When the arteries reach cells, they divide into smaller blood vessels called:​

1. Ventricles
2. Capillaries
3. Veins
4. Aorta

Q. Cardiac muscles are involuntary muscles.

1. True
2. False

Q. The absorption of nutrients and exchange of respiratory gases between blood and tissues takes place in

1. Veins
2. Arteries
3. Heart
4. Capillaries

Q.

Question 3

The absorption of nutrients and exchange of respiratory gases between blood and tissues takes place in –

(a) veins

(b) arteries

(c) heart

(d) capillaries