Question

System 211 Chapter 11 The Key Choices A. ○Tunica C.。Turica externa 'unica media 1. Singhe thin layer of endothelium 2 Bulky middle coat, containing smooth muscle and elastin sinooth surface to decrease resistance to blood flow 5. Provides a 4. The only tunic of capillaries 5. Also called the adventitia 6. The only tunic 7. Supporting, protective coat that plays an active role in blood pressure regulation Figure 11-6 A. B. C. Gross Anatomy of Blood Vessels 17. Figures 11-7 and 11-8 on pp. 212 and 213 illustrate the location of important arteries and veins of the body. The Color the veins blue and then identify each vein veins are shown in Figure 11-7. The arteries are shown in Figure 11-8. Color them red and then provided with a leader line on by leader lines on the figure. NOTE: If desired, the ves identify those imay be colored differently to aid you in their later identification. sels id

Answer 1

1) Single thin layer of endothelium - Tunica Intima.

The tunica intima is the innermost layer of an artery or vein. It is made up of single layer of endothelial cells.

2) Bulky middle coat, containing smooth muscle and elastin - Tunica Media.

Tunica media is made up of smooth muscle cells, elastic tissue and collagen.

3) Provides a smooth surface to decrease resistance to blood flow - Tunica Intima.

Tunica Intima has a smooth surface to decrease resistance to blood flow.

4) The only tunic of capillaries - Tunica Intima.

Tunica Intima is only tunic, which is made of capillaries.

5) Also called the adventitia - Tunica Externa.

The tunica externa is also known as the tunica adventitia.

6) The only tunic that plays an active role in blood pressure regulation - Tunica Media.

The tunica media contains a large amount of smooth muscle. Hence, it acts as regulator of blood flow between the arteries and the delicate capillaries.

7) Supporting, protective coat - Tunica Externa

The tunica externa is the outermost layer of a blood vessel, which surrounds the tunica media. It is composed of collagen. It also acts as supportive and protective coat of the blood vessels.