Vascular System & arterial system

Question 1

What system refers to the blood vessels that carry the blood around the body?

Answer 1

Vascular system

Question 2

There are 3 major types of blood vessels, what are they?

Answer 2

arteries, capillaries and veins

Question 3

What blood vessel carries oxygenerated blood away from the heart?

Answer 3

arteries

Question 4

What blood vessels are tiny pathways & site of gas exchange.

Answer 4

capillaries

Question 5

What blood vessels carry deoxygenated blood back to the heart?

Answer 5

veins

Question 6

Oxygenerated blood enters body organs & tissues & deoxygenerated blood leaves the organs & tissues thru the ?

Answer 6

capillaries

Question 7

The walls of all blood vessels, except capillaries have 3 layers or tunics that surround the lumen, what is the outside layer called?

Answer 7

tunica externa the outer tunic comprised of connective tissue.

Question 8

The walls of all blood vessels, except capillaries have 3 layers or tunics that surround the lumen, what is the middle layer called?

Answer 8

tunica media - comprised of smooth muscle cells & sheets of elastin.

Question 9

The walls of all blood vessels, except capillaries have 3 layers or tunics that surround the lumen, what is the inner tunic called?

Answer 9

tunica intima - comprised of endothelium which is flat squamous epithelial cells.

Question 10

Blood vessels - what is the outer tunic (tunica externa) comprised of?

Answer 10

connective tissue - this layer strengthens & supports the blood vessel.

Question 11

Blood vessels - what is the middle tunic (tunica media) comprised of?

Answer 11

smooth muscle cells & sheets of elastin.

Question 12

Middle tunic (tunica media) - reduction in the lumens diameter as smooth muscle contracts - what is this called?

Answer 12

vasoconstriction

Question 13

Middle tunic (tunica media) - increase in the lumens diameter as the smooth muscle relaxes - what is this called?

Answer 13

vasodilation

Question 14

Blood vessels - what is the inner tunic (tunica intima) comprised of?

Answer 14

endothelium which is flat squamous epithelial cells. this provides a smooth surface for blood flow thru the lumen of the vessel.

Question 15

What does bifurcates mean?

Answer 15

branches into two e.g. common iliac artery bifurcates into the internal & external iliac arteries

Question 16

Elastic arteries or conducting arteries - Which large arteries supply the head and neck?

Answer 16

common carotid arteries

Question 17

Elastic arteries or conducting arteries - Which large arteries supply the arms, and to a lesser extent head & trunk?

Answer 17

subclavian arteries

Question 18

Elastic arteries or conducting arteries - on the right side which artery bifurcates into the right common carotid & right subclavian arteries?

Answer 18

brachiocephalic artery

Question 19

Which large artery supply the pelvis and lower limbs?

Answer 19

common iliac artery

Question 20

Elastic arteries or conducting arteries - The common iliac artery bifurcates into what?

Answer 20

the internal and external iliac arteries

Question 21

What is the only artery (other than the umbilical artery) to carry deoxygenated blood?

Answer 21

pulmonary trunk or main pulmonary artery

Question 22

What are the largest arteries, near the heart called?

Answer 22

Elastic arteries or conducting arteries

Question 23

What are the medium sized arteries called? They provide blood to specific organs or areas.

Answer 23

muscular arteries or distributing arteries. e.g. renal arteries

Question 24

Smaller arteries - blood flows into smaller & smaller arteries that keep dividing within organs until they reach ?

Answer 24

arterioles.

Question 25

What do arterioles flow into?

Answer 25

capillaries