Lab 3

Question 1

Capillary bed characteristics

Answer 1

lie within the tissue being supplied, site for exchange b/w cells and blood, diffusion distance is minimized at exchange sites; drain into venules

Question 2

Tunica intima (interna)

Answer 2

Lines lumen, single layer of endothelium (simple squamous), lines entire CV system and is continuous with endocardium

Question 3

Tunica media

Answer 3

Primarily smooth muscle and elastin; controlled by sympathetic nervous system to alter diameter

Question 4

Tunica externa (adventitia)

Answer 4

Areolar or fibrous connective tissue

Question 5

Characteristics unique to artery

Answer 5

Internal and external elastic membrane

Question 6

Largest to smallest diameter

Answer 6

Vein, artery, arteriole, venule, capillary

Question 7

Thickest to thinnest wall

Answer 7

Artery, vein, arteriole, venule, capillary

Question 8

Arteries to know

Answer 8

Head/neck Fig. 32.3
Upper limb/thorax Fig. 32.4
Abdomen Fig 32.5
Pelvis/lower limb Fig 32.6

Question 9

Veins to know

Answer 9

Head/neck Fig. 32.10
Upper limb/thorax Fig. 32.11
Abdomen Fig 32.9, 32.14
Pelvis/lower limb Fig 32.8

Question 10

Lobar arteries

Answer 10

Pulmonary divides into these arteries
3 in right lung, 2 in left lung

Question 11

Bronchial arteries

Answer 11

The arteries that supply the lung tissue with its blood

Question 12

Describe the difference in the branching of the R/L carotids and R/L subclavians from the aorta

Answer 12

The R. carotid artery branches from the R. brachiocephalic artery whereas the L. carotid artery branches straight from the aortic arch. Likewise, the R. subclavian artery branches from the R. Brachiocephalic artery whereas the L. subclavian branches from the aortic arch.

Question 13

What marks difference between abdominal and thorax aorta and what does it pass through

Answer 13

Diaphragm; aortic hiatus

Question 14

Vessels visible from the surface

Answer 14

Veins

Question 15

What vein is used for blood drawing

Answer 15

Median cubital vein or cephalic vein

Question 16

Advantage of hepatic portal system

Answer 16

Hepatic circulation is advantageous because it allows the liver to process nutrient rich blood as well as remove toxins before the blood moves to the rest of the body.