Blood Vessels and Hemodynamics

Question 1

blood vessels

Answer 1

delivery system of dynamic structures that begins and ends at heart

Question 2

Arteries

Answer 2

carry blood AWAY from the heart

Question 3

Veins

Answer 3

carry blood TOWARDS the heart

Question 4

What is the order of the blood vessels starting FARTHEST from the heart

Answer 4

Arteries–> Arterioles –> Capillaries –> Venules –> Veins

Question 5

What is the only blood vessel that directly serves the cells?

Answer 5

Capillaries

Question 6

Tunica intima

Answer 6

MOST INNER

Question 7

What does the tunica intima sit on?

Answer 7

Endothelium, Subendothelium layer, Internal elastic membrane

Question 8

Tunica media

Answer 8

MIDDLE LAYER,

Question 9

What is the tunica media comprised of?

Answer 9

SMOOTH muscle, elastic fibers
External elastic fibers

Question 10

Tunica Externa

Answer 10

External/LAST layer

Question 11

What is the tunica externa comprised of?

Answer 11

collagen fibers, vasa vasorum

Question 12

VASA Vasorum

Answer 12

Small vessels that receive their own supply of blood

Question 13

What are the three arterial vessels?

Answer 13

Elastic arteries, Muscular arteries, Arterioles

Question 14

Elastic Arteries are known as

Answer 14

CONDUCTING arteries

Question 15

Muscular Arteries are known as

Answer 15

DISTRIBUTING arteries

Question 16

Arterioles are known as

Answer 16

RESISTANCE VESSELS (because changing diameters change resistance in blood vessels)
- small,

Question 17

Capillaries

Answer 17

Microscopic Blood Vessels, walls of thin tunica intima

Question 18

What are the three types of Capillaries found in the body

Answer 18

Continuous Capillaries, Fenestrated capillaries,
Sinusoidal capillaries

Question 19

Continuous Capillaries

Answer 19

• least permeable and most abundant
  (found in skin, muscle and CNS)
• LEAST LEAKY of all three

Question 20

Fenestrated capillaries

Answer 20

IN the MIDDLE!
similar to endothelial cells riddled with pores (fenestrations)
(found in small intestine, endocrine organs) not as leaky as Sinusoidal capillaries

Question 21

Sinusoidal capillaries

Answer 21

Highly modified, LEAKY capillaries
(found in liverm bone marrow, lymphoid tissues, endocrine organs)
- Large irregular lumens

Question 22

Venules

Answer 22

Formed when capillary beds unite

Question 23

Veins

Answer 23

Formed when venules converge

Question 24

In the veins, how many tunics do they have?

Answer 24

THREE
but the walls are thinner and lumens larger

Question 25

Up to what percentage of blood is there in veins at any one time?

Answer 25

65%

Question 26

What does capacitance vessels or blood resevoirs imply?