Lab: Blood Vessels

Question 1

The largest most elastic artery.

Answer 1

Elastic (conducting) artery

Question 2

Examples: aorta, brachiocephalic, common carotid

Answer 2

Examples of Elastic arteries

Question 3

What elastic arteries do

Answer 3

Expand and recoil for continuous blood flow

Question 4

Medium sized arteries with the most smooth muscle

Answer 4

Muscular (distributing) arteries (size)

Question 5

The most common artery, with less elastic tissue

Answer 5

Muscular (distributing) arteries (frequency)

Question 6

The smallest artery

Answer 6

Arterioles (size)

Question 7

Arteries with very thin tunica externa and a few layers of smooth muscle in the media.

Answer 7

Arterioles (describe tunics)

Question 8

Vessel that only contains tunica intima

Answer 8

Capillaries (what tunic?)

Question 9

The smallest veins with very thin tunics

Answer 9

Venules (describe size + tunic)

Question 10

The number of smooth muscle layers in a Venule

Answer 10

The vessel with 2 layers of smooth muscle and no elastic tissue

Question 11

Contains fibrous tissue in the tunica externa, with a thin tunica media and large lumen

Answer 11

Veins (describe tunics and lumen

Question 12

Examples: brachial and radial artery

Answer 12

Examples of Muscular (distributing) arteries

Question 13

Supply capillary beds

Answer 13

The role of Arterioles

Question 14

Drains capillary beds

Answer 14

The role of venues

Question 15

The role of capillaries

Answer 15

Provide for the exchange of materials between blood and tissue cells

Question 16

Low pressure vessels

Answer 16

Vein (pressure level)

Question 17

Composition of the Tunica Intima (3)

Answer 17

1. simple squamous endothelium 2. Subendothelial layer 3. Internal Elastic membrane

Question 18

Role of Tunica Media

Answer 18

Regulates diameter of vessels affecting blood pressure

Question 19

Composition of the Tunica Externa (2)

Answer 19

1. Areolar or fibrous connective tissue 2. Vasa vasorum

Question 20

Role of Tunica Intima

Answer 20

Line the lumen and reduce friction for blood flow

Question 21

Composition of Tunica Media (2)

Answer 21

1. Smooth muscle and elastin 2. External elastic membrane

Question 22

Vasa Vasorum

Answer 22

Tiny bood vessels in the tunica externa

Question 23

Role of Tunica Externa

Answer 23

Supports and protects the vessel

Question 24

Composition of capillaries

Answer 24

1. Basement membrane (outer) 2. Endothelial cells (inner)

Question 25

How does a vein differ from an artery? (3)

Answer 25

1. contains valves to prevent back flow 2. thinner tunica media (less pressure) 3. Elongated lumen

Question 26

What prevents back flow in the veins?

Answer 26

1. Valves 2. Skeletal muscle “pump”