Blood Vessels

Q. What is incorrect about a vein?

1. A vein has a thinner wall compared to an artery
2. Blood flows at zero pressure through a vein
3. Blood tends to flow backwards through a vein
4. There are valves in a vein

Q. Name the type of blood vessels, which carry blood from organs to the right atrium heart.

1. Pulmonary vein
2. Vena cava
3. Aorta
4. Pulmonary artery

Q. Select the correct direction of flow of blood:

1. Heart $\to$ Artery $\to$ Arteriole $\to$ Capillary $\to$ Vein $\to$ Venule
2. Heart $\to$ Vein $\to$ Venule $\to$ Capillary $\to$ Artery $\to$ Arteriole
3. Heart $\to$ Artery $\to$ Arteriole $\to$ Capillary $\to$ Venule $\to$ Vein
4. Heart $\to$ Artery $\to$ Arteriole $\to$ Vein $\to$ Venule $\to$ Capillary

Q. Blood flows at a high pressure through arteries. Hence, it makes sense for arteries to have _______ and elastic walls.

Q. Which statements about blood vessels are correct?

1. Arteries eventually give rise to capillaries.
2. Arteries have thicker walls than veins.
3. Blood flows at a higher pressure in veins than in arteries.
4. Tissues exchange substances with blood through veins.

Q.

Exchange of material between the blood and surrounding cells takes place across the thin walls of ___.

Q.

The smallest blood vessel in the body is:

1. Artery

2. Capillary

3. Vein

4. Vena Cava

Q.

Arteries are the widest blood vessels.

1. True

2. False

Q.

The capillaries join together to form __.

Q.

Veins carry blood from ___ to ___.