Vascular System and Vessels Flashcards Preview

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Flashcards in Vascular System and Vessels Deck (64):
1

Pulmonary Vascular System

Drains into left atrium
Made of pulmonary veins
portion of the cardiovascular system which carries deoxygenated blood away from the heart, to the lungs, and returns oxygenated (oxygen-rich) blood back to the heart

2

Systematic Cardiovascular System

Drains into right atrium

3

Arteries carry what type of blood

Oxygenated

4

Arteries have high or low pressure

Higher pressure

5

Veins carry what type of blood

Deoxygenated

6

Veins have high or low pressure

Lower pressure

7

Systole

Goes with contraction

8

Diastole

Goes b/w contractions

9

What germ layer are blood vessels derived from

Mesoderm

10

What germ layer organs do blood vessels supply

Mesodermal EXCEPT articular cartilage

11

Three tissue layers of a blood vessel

1 - intima
2- media
3- Adventitia

12

Intima layer of blood vessels

Inner layer
Most thin
Endothelium

13

Media layer of blood vessles

Middle layer of blood vessel
Smooth muscle
Controlled by autnervous system

14

Adventitia layer of blood vessels

Top layer of blood vessels
Fibrous tissue
Nerves on the outside

15

Difference in the walls of blood vessels

Art -> Thick
Veins -> Thin
Caps -> Thinnest

16

Difference in the lumen of blood vessels

Art -> small
Veins -> bigger

17

What do veins have that arteries do not

Valves

18

What do arteries have that veins do not

Elastic fibres

19

Two types of arteries are

Muscular and Elastic

20

Elastic arteries are found

Close to the heart

21

Properties of elastic arteries

Lots of elastic
Conducting vessels
Prevent a drop in pressure by dialating in response to contractions

22

Properties of muscular arteries

Lots of smooth muscles
Distributing vessels --> channel blood where and when it is needed

23

Arterioles are controlled by what nerves

vasomotor nerves

24

Anastamosis definition

Linking between arteries or arterioles w/o capillaries

25

Two types of anastamosis

Potential
True

26

Potential anastamosis

Only make lumen-lumen contact when it is actually needed -> like when working out

27

True anastamosis

Always have lumen-lumen contact

28

AV anastamosis

B/w arteries and veins --> thermoregulation

29

End arteries

Do not link with other arteries

30

Two types of end arteries

Anatatomical
Functional

31

Anatomical end arteries

No anastamosis EVER --> occlusion = death of tissue

32

Functional end arteries

Can anastamosis when needed

33

Function of vein valves

Direct flow against gravity to heart
Direct flow from superficial to deep veins

34

Valves are found in which veins

LIMBS not trunk

35

Axial veins

Superficial veins that direct flow from dermis to deeper veins

36

Perferating veins

Connect superficial with deeper veins

37

Venae comitantes

Pairs of veins wrapped around arteries usually found in the limbs
Conserve temp -> use heat from arteries

38

Inspiration of the thoracic pump leads to

Diaphragm lowering
Lower pressure
Inf. VC --> shortens --> empties into heart
Sup. VC --> lengthens --> drains from heart

39

Expiration of the thoracic pump leads to

Diaphragm moving up
Higher pressure
Inf. VC --> lengthens --> drains from heart
Sup. VC --> shorterns --> empties into heart

40

Muscular pump

Belly of skeletal muscle compress veins

41

Communications

Direct links between veins

42

What is inside a lymph vessel

Tissue fluid with plasma protein

43

Function of lymph vessels

Carry lymph tissue and foreign vessels to nodes --> filtered
Lymph returned to vessels

44

Afferent valves

Lymph valves that travel TOWARDS nodes
More abundant

45

Efferent valves

Lymph valves that travel AWAY from nodes
Less abundant

46

Central lymph node

Is the first node and is the primary site of defence

47

Lymph flow is directed by

Sucking -> thoracic press
Squeezing -> muscles
Milking -> veins

48

Lymph nodes

Lymphoid tissue
Filters lymph --> exposes pathogens to immune sytem

49

Sites of lymphoid tissue

Spleen
Tonsils
Peyers patches
Thymus

50

Peyers patches

Collection of tissue found in the mucos of GI Tract

51

Thymus lymphoid tissue

Upper thorax into the neck

52

Tonsil lymphoid tissue

Tissue encircling pharynx and respiratory system

53

Two major lymph ducts

Thoracic
Right Lymph

54

Thoracic lymph duct

Drains everything excpt upper right

55

Right lymph ducts

Drains upper right ONLY.

56

thoracic venous pump

Return of blood from trunk
Double pump mechanism - with respiration
Diaphragm descends --> neg pressure --> shorted IVC & longer SVC

57

Where are venae comitantes generally located

Limbs - distally

58

What are perforating or communicating veins?
Why are they particularly important in the lower limbs?

Links between veins
Lower limbs -> perforate deep fascia
Have valves directing flow from superficial fascia to deep fascia.

59

Describe lymph drainage in terms of pressure, volume and contents

low-volume, low-pressure, and contains some white blood cells but no other blood cells.

60

What vessels carry lymph to lymph nodes?

Afferent vessels

61

What vessels carry lympy away from lymph nodes

Efferent vessels

62

the majority of lymph drains towards left or right?

Left

63

What is the function of lymph nodes

Filter the lymph
Release lymphocytes into the venous system

64

Sentinel nodes

The first lymph nodes encountered in the path of lymph drainage from a particular organ