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Anatomy midterm #3 > Chapter 23 Blood Vessels > Flashcards

Chapter 23 Blood Vessels Flashcards

1
Q

Differences between arteries and veins

A

Arteries are thicker and carry blood away from heart. Located deeper, more muscular and has no valves. Oxygenated blood

Veins are thinner and carry blood towards the heart. Located superficially, have valves

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2
Q

more anatomical differences between arteries and veins?

A

Arteries; have smaller lumen, keep shape when blood flow stops, tunica media is thickest, high pressure, systemic arteries high O2

Veins: LArger lumen, collapse when blood flow stops, tunica externa is thickest, low pressure, systemic veins low O2

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3
Q

What are the tunics of the Veins and Arteries?

A

Tunica Intima
Tunica media
Tunica Externa

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4
Q

Structure of Tunica Intima?

A

Collagen fibers
Internal elastic lamina
Thin is both arteries and veins

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5
Q

Structure of Tunica Media?

A

Smooth muscle for vasodilation/constriction
External elastic lamina
Artery is thick
Vein is thin

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6
Q

Structure of Tunica externa?

A

Contains blood vessels: Vasa vasorum
Artery is thin
Vein is thicker

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7
Q

what is the Internal elastic lamina?

A

separates tunica intima and tunica media

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8
Q

What is the external elastic lamina?

A

separates tunica media and tunica externa

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9
Q

What are the 3 types of arteries?

A
  1. Elastic
  2. Muscular
    3.Arterioles
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10
Q

What is the structure of elastic arteries?

A

Largest
Contain elastic fibers in tunica media
allows stretch and propels blood
branch into muscular arteries

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11
Q

Examples of elastic arteries?

A
  1. Aorta
  2. Pulmonary trunk
  3. Brachiocephalic
  4. Subclavian
  5. Carotid
  6. Iliac
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12
Q

What are muscular arteries?

A

Medium-sized
Contain mostly smooth muscle fibers in tunica media
Vasodilation and vasoconstriction
defined internal elastic lamica
thin external elastic lamina
cant propel blood
Tunica media 40mlays of smooth muscle
Vascular tone

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13
Q

Examples of muscular arteries?

A
  1. brachial
  2. anterior tibial
  3. coronary
  4. msenteric
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14
Q

What are arterioles?

A

Smallest
thickness varies
less than 6 cells in tunica media
Vasoconstriction to increase upstream BP and decrease down stream BP

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15
Q

What is the structure of capillaries?

A

Smallest blood vessel
Slightly bigger than a RBC
Only have lumen and tunica intima

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16
Q

What is the function of capillaries?

A

Exchange vessel
Exchange gasses and waste/nutrients

17
Q

What are the 3 types of Capillaries?

A
  1. Continous
  2. Fenestrated
  3. Sinusoids
18
Q

What are continuous capillaries?

A

A continuous tube
only interrupted by intercellular clefts

19
Q

Location of continuous capillaries?

A

Muscles and brain

20
Q

What are Fenestrated capillaries?

A

Have many small fenestrations (pore-like)

21
Q

Location of fenestrated capillaries

A

Small intestine and kidney

22
Q

What are Sinusoid capillaries?

A

Widest
Have large fenestrations
missing basement membrane
very large intercellular clefts

23
Q

Location of sinusoid capillaries?

A

Bone marrow and liver

24
Q

Function of fetal development circulation?

A

Allows developing fetus to exchange materials with mother
fetus obtains O2 and elimates CO2 and wastes through maternal blood

25
Q

What is the exchange site?

A

Placenta
-In mothers uturus contains many capillaries
-attaches to umbilical cord

26
Q

What does Ductus arteriosus do?

A

allows fetal blood to by pass lungs and go straight to aorta/system

27
Q

What does the Ductus venosus do?

A

allows fetal blood to bypass liver for filtration and go straight to IVC

28
Q

What does the Ductus arteriosus turn into?

A

Ligamentum arteriosum

29
Q

What does the Ductus venosus turn into?

A

Ligamentum venosum

30
Q

What does the foramen ovale turn into?

A

Fossa ovalis

31
Q

What do the umbilical arteries turn into?

A

Media umbilical ligaments

32
Q

What does the umbilical vein turn into?

A

Round ligament of liver (LIgamentum teres)

Anatomy midterm #3 (6 decks)

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