Chapter 21 Flashcards Preview

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Flashcards in Chapter 21 Deck (50)
1

Lymphatic function aids the _____ system by transporting/housing lymphocytes and other immune cells that help defend against pathogens

immune system

2

Lymphatic function aids the _____ system by returning excess fluid to venous blood to maintain fluid balance, blood volume and blood pressure

cardiovascular system

3

The lymphatic function has ____ function of its own.

no unique

4

15% of plasma lost to interstitial fluid when traveling through blood capillaries which is ___ liters a day.

3 liters

5

Interstitial fluid moves into lymphatic capillaries due to _____ pressure

hydrostatic

6

______ differ from blood capillaries:
larger in diameter
lack basement membrane
overlapping endothelial cells

lymphatic capillaries

7

Overlapping endothelial cells act as one way flaps to allow fluid to enter but prevent its loss in ____.

lymphatic capillaries

8

_____ hold endothelial cells to near by structures

anchoring filaments

9

Movement of lymph through vessels due to:
______ and respiratory pump. Pulsatile movement of blood in nearby arteries and rhythmic contraction of _______ in walls of larger lymph vessels (trunks and ducts)

skeletal muscle pumps
smooth muscles

10

____ filter lymph as it passes through vessels

lymph nodes

11

____ lympatic trunks drains head and neck

jugular

12

____ lymphatic truns drain upper limbs, breasts and superficial thoracic walls.

subclavian

13

____ lymphatic trunks drain deep thoracic structures.

bronchomediastinal

14

____ lymphatic trunks drain most abdominal structures.

intestinal

15

____ lymphatic trunk drains lower limbs, abdominopelvic wall and pelvic organs.

lumbar

16

_____ are involved in formation and maturation of lymphocytes

primary structures
* red bone marrow and thymus

17

____ ~ serve to house both lymphocytes and other immune cells following their formation

secondary structures
*Lymphatic cells trapped within a reticular extracellular connective tissue matrix
*Sites where an immune response is initiated
*Lymph nodes, spleen, tonsils, lymphatic nodules and MALT

18

____ located witin the spongy bone of the flat bones of the skull, vertebrae, ribs, sternm, epiphyses of the humerus and femur.

red bone marrow

19

____ function in t lymphocyte maturation.

thymus

20

Thymus grows until puberty and then cells regress and are replaced by ____.

adipose tissue

21

Cortex of the thymus contains ____ t lymphocytes

immature

22

Medulla of the thymus contains ____ t lymphocytes

mature

23

_____ secrete thymic hormones (thymulin) that participates in the maturation of T-lymphocytes

Epithelial cells

24

____ are the main lymphatic organ

lmph nodes

25

____ are Small, round encapsulated structures located along the pathway of lymph vessels

lymph nodes

26

____ filter lymph of unwanted substances.

lymph nodes

27

There are between ___ and ___ lymph nodes throughout the body.

500 to 700

28

_______ house both proliferating B-lymphocytes and macrophages

Germinal centers

29

Medulla has strands of connective tissue fibers that support B and T-lymphocytes and macrophages (called ______)

medullary cords

30

The germinal centers are surrounded by the _____ which contains T-lymphocytes, macrophages and dendritic cells

mantle zone

31

Lymph enters through ____ lymph vessels then leaves through one efferent lymph vessel

afferent

32

The ____ is responsible for phagocytosis of bacteria and other foreign materials in the blood as part of the body's defense

spleen

33

The ____ is responsible for Phagocytosis of old defective erythrocytes and platelets from circulation

spleen

34

The ____ acts as a blood reservoir and storage site for both erythrocytes and platelets

spleen

35

Largest lymphatic organ

spleen

36

The spleen lacks a cortex and medulla and is instead divided into _____.

red and white pulp

37

______ consists of spherical cluster of T-lymphocytes, B-lymphocytes and macrophages which surround a central artery

white pulp

38

_____ contains erythrocytes, platelets, macrophages and B-lymphocytes

red pulp

39

Blood Flow through spleen: splenic artery, central artery (of white pulp), splenic sinusoid (of red pulp), sinusoid capillaries, venules, splenic vein

list

40

____ are Un-encapsulated lymphatic structures containing lymphatic nodules

tonsils

41

_____ Protect against foreign substances inhaled or ingested

tonsils

42

Invaginated outer edges called ______ increase surface area

tonsillar crypts

43

Small oval clusters of lymphatic cells not surrounded by capsule

lymph nodules

44

______ located in lamina propria of mucosa

MALT (mucosa-associated lymphatic tissue) ~

45

_____ Defend against foreign substances that come in contact with mucosal membranes

malt

46

____ found in Gastrointestinal, respiratory, urinary and reproductive tracts

malt

47

_____ ~ scattered lymphatic nodules found in every body organ and within wall of the appendix

diffuse lymphatic tissue

48

MALT defends against ______ that come in contact with mucosal membranes.

foreign substances

49

_____ are MALT found in the small intestines, primarily in the ileum.

Payer' patches

50

A bi-lobed organ in the superior mediastinum.

thymus