Blood vessels Flashcards

1
Q

Does blood go from high pressure to low pressure or vice versa?

A

High pressure to low

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2
Q

Tunica intima

A

innermost layer of blood vessels. endothelium that is continuous with the lining of the heart. internal elastic lamina provides ability to expand and recoil

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3
Q

Tunica media

A

middle layer of blood vessels. smooth muscle under sympathetic innervation and elastin. much thicker in arteries

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4
Q

Tunica externa or adventitia

A

outer layer of blood vessels. external elastic lamina. thicker in veins

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5
Q

Capillaries

A

consist of only simple squamous endothelium. Three types: continuous, fenestrated, and sinusoid

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6
Q

Continuous capillaries

A

nice cell to cell junctions. exchange of gases, water and lipids

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7
Q

Fenestrated capillaries

A

exchange for molecules, peptides (hormones)

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8
Q

Sinusoid capillaries

A

“open space” proteins and cells. in the liver and spleen

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9
Q

Elastic arteries

A

high pressure tubes. large amounts of elastin for stretch (thick tunica media), expand to receive blood. pulmonary trunk and aorta

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10
Q

Muscular arteries

A

most arteries, mid-sized

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11
Q

Arterioles

A

tiny vessels. mostly smooth muscle, blood pressure is regulated by the diameter of the vessel

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12
Q

Capillaries

A

sites of exchange of gases, nutrients, fluid, etc. Lumen is just large enough to allow blood cells to squeeze through

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13
Q

Veins compared to arteries

A

more connective tissue, less muscle, thinner walls, larger lumens, medium sized valves have valves to prevent backflow and aid circulation, large veins like vena cava have longitudinal smooth muscle in tunic externa

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14
Q

What part of the aorta is located in the pericardium

A

the ascending aorta, thus is in the middle mediastinum

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15
Q

What are the first branches off the aorta

A

right and left coronary artery

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16
Q

Where is the arch of the aorta located?

A

superior mediastinum

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17
Q

Where is the descending aorta located

A

the posterior mediastinum

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18
Q

The descending aorta becomes..

A

the abdominal aorta

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19
Q

The abdominal aorta becomes..

A

the right and left common iliac arteries, which branch into internal and external iliac arteries

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20
Q

The right and left common carotid arteries branch into..

A

internal (doesn’t branch until inside cranium and supplies the anterior and middle brain) and external (many branches to face) carotid.

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21
Q

Vertebral artery

A

supplies posterior brain, branch off the subclavian artery, travels through transverse foramina of cervical vertebrae

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22
Q

Circle of Willis

A

internal carotid branches to form the anterior and middle cerebral arteries. right and left vertebral form basilar which splits into posterior cerebral arteries. Also have 1 anterior and two posterior communicating arteries

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23
Q

Subclavian artery becomes…

A

axillary after passing the first rib

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24
Q

Axillary artery becomes…

A

brachial after teres major

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25
Brachial artery splits into...
radial and ulnar
26
Deep brachial artery
branch of brachial that goes deep to supply extensors of arm (triceps)
27
Common interosseous artery
branch off the ulnar artery, has anterior and posterior branches itsself
28
Superficial and deep palmar arches
radial and ulnar arteries anastomose to form these in the palm of hand
29
Collateral circulation of elbow
in case of blockage or brachial artery in the elbow. blood can continue to reach forearm by collateral arteries. off of brachial are collateral arteries. off of radial and ulnar or recurrent arteries. They anastomose
30
External iliac artery...
from common iliac artery. forms femoral artery after passing under inguinal ligament
31
Internal iliac artery..
Supplies organs in pelvis (bladder, uterus, vagina, rectum) dives deep and becomes superior and inferior gluteal arteries which run with the nerves. Inferior gluteal to maximus
32
Femoral artery...
gives off branch of deep femoral which supplies the hamstrings. continues down thigh and becomes popliteal artery after passing through the adductor hiatus
33
Collateral circulation around knee
Genicular arteries
34
Popliteal artery
from femoral once it passes through adductor hiatus. splits into anterior and posterior tibial arteries
35
anterior tibial artery
supplies anterior compartment of leg. Runs with deep fibular nerve
36
Posterior tibial artery
supplies posterior compartment of lef, runs with tibial nerve
37
Dorsalis pedis
Forms when anterior tibial artery passes into dorsum of foot. terminates as arcuate artery.
38
Arcuate artery
sens perforating arteries to anastomose with arteries in the plantar foot. Forms collateral circulation between anterior and posterior tibial arteries
39
Fibular artery
branches off from posterior tibial. supplies fibularis longus and brevis muscles. Branches in the plantar surface of foot into medial and lateral plantar arteries which anastomose
40
Descending or thoracic aorta
found in posterior mediastinum. gives off posterior intercostals arteries
41
Internal thoracic arteries
located on each side of sternum, branches off of subclavian artery. give off anterior intercostal arteries which anastomose with posterior intercostals
42
Abdominal aorta
from thoracic, becomes abdominal once it passes through the diaphragm. The major branches, celiac, superior mesenteric artery, inferior mesenteric artery. Also renal arteries to kidneys and gonadal to repro organs
43
Often there will be numerous veins with one artery
True!
44
Superficial veins travel in hypodermis and have no accompanying artery
true!
45
Confluence of sinuses
Superior and inferior sagittal, straight and occiptal sinus form it. Drained by transverse sinus, which becomes sigmoid sinus which exits cranium through jugular foramen
46
Sigmoid sinus becomes...
internal jugular vein once it passes through jugular foramen
47
External jugular vein
drains external neck. visible externally
48
Is there a carotid vein?
no
49
Subclavian and internal jugular veins meet to form...
brachiocephalic vein on each side
50
Superior vena cava formed by...
right and left brachiocephalic veins
51
Basilic vein empties into...and helps form....
empties into brachial vein and then together they form the axillary vein.
52
Cephalic vein empties into..
axillary vein
53
Great Saphenous vein
superior to medial malleolus and medial side of leg and thigh. empties into femoral vein. often used for coronary artery by-pass graft
54
Small saphenous vein
behind the lateral malleolus up to the back of the leg. empties into popliteal vein
55
Superior vena cava drains...
the arm and the head
56
Inferior vena cava drains..
the abdomen and lower extremity
57
Azygos system
drains the posterior intercostal veins (internal thoracic drains anterior). Azygos empties into SVC via arch of azygos
58
Internal and external iliac veins form the common iliac veins which then...
combine to form the IVC
59
Femoral vein in thigh becomes...
external iliac vein in pelvis
60
Renal veins carry blood from...
kidney and empty to IVC
61
Veins of the digestive system
same names as arteries but DO NOT drain into IVC. they drain into the liver via Hepatic Portal System. venous blood from digestive organs carry nutrients that must go to liver for metabolism and storage