Chapter 18 - Circulatory system

Question 1

Transports blood away from the heart

Answer 1

Arteries

Question 2

Transports blood to the heart

Answer 2

Veins

Question 3

Exchanges substances between blood and tissues ; interconnects smallest arteries and smallest veins

Answer 3

Capillaries

Question 4

Conducts blood between the heart and peripheral tissues

Answer 4

Blood vessels

Question 5

To and from gas exchange surfaces in the lungs

Answer 5

Pulmonary circuit

Question 6

To and from rest of body

Answer 6

Systemic circuit

Question 7

Each circuit begins and ends with the _____ and occurs in _____.

Answer 7

Heart ; sequence

Question 8

What is the entry chamber?

Answer 8

Right atrium

Question 9

What is the pathway for the right atrium? and what does it do/what kind of blood?

Answer 9

To right ventricle to pulmonary circuit ; collects blood from systemic circuit ; oxygen-poor blood

Question 10

What is the pathway for the pulmonary circuit? What kind of blood?

Answer 10

Pulmonary arteries to pulmonary capillaries to pulmonary veins ; oxygen-poor blood

Question 11

What is the pathway for the left atrium? What kind of blood?

Answer 11

Receives blood from pulmonary circuit ; to left ventricle to systemic circuit ; oxygen-rich blood

Question 12

What is the pathway for the systemic circuit? What kind of blood?

Answer 12

Systemic arteries to systemic capillaries to systemic veins ; oxygen-rich blood

Question 13

What are the 5 general blood vessel classes?

Answer 13

Arteries, arterioles, capillaries, venules, and veins

Question 14

Large vessels close to the heart that stretch and recoil when heart beats ; include pulmonary trunk, aorta, and branches

Answer 14

Elastic arteries

Question 15

Medium-sized arteries ; distribute blood to skeletal muscles and internal organs

Answer 15

Muscular arieries

Question 16

Poorly defined tunica externa ; tunica media is only 1-2 smooth muscle cells thick

Answer 16

Arterioles

Question 17

Only blood vessels to allow exchange between blood and interstitial fluid ; very thin walls allow easy diffusion

Answer 17

Capillaries

Question 18

What do the venules include and what do they do?

Answer 18

Small veins (those smaller than 50 m lack a tunica media and resemble expanded capillaries) ; collect blood from capillaries

Question 19

What do the veins include?

Answer 19

Medium-sized veins

Question 20

What are medium-sized veins?

Answer 20

Smaller than arteries ; range from 2-9 mm in internal diameter ; thin tunica media with smooth muscle cells and collagen fibers ; thickest layer is tunica externa with longitudinal collagen and elastic fibers