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A&P 3.1 > Lymphatic System > Flashcards

Flashcards in Lymphatic System Deck (35):
1

A network of vessels that penetrate nearly every tissue and a collection of tissues and organs that filter the _____ and produce _____ ______

lymph
immune cells.

2

Without the lymphatic system, the body would die from _________ ______.

Hypovolemic shock

3

Over the course of a day, the lymphatic system reabsorbs ___L of water and ___ of the plasma proteins.

2-4L
¼- ½ the plasma proteins

4

Describe lymph

A clear, or yellowish fluid derived from interstitial fluid and found in lymph vessels
Similar to blood plasma, but low in protein
Its composition varies substantially from place to place and time to time

5

What are the 4 parts of the lymphatic system?

Lymph
Lymphatic vessels
Lymphatic tissue
Lymphatic organs

6

What are the tunics of lymph vessels?

Have the same tunics as arteries/veins, but the walls are thinner, and have more valves than veins. Also, no endothelial cells (by definition, those are only in arteries/veins)

7

Where do lymph vessels take fluid?

Away from tissues

8

Lymph vessels begin as lymph ______, ends in one of two lymph ____

capillaries
ducts

9

What kind of cells make up lymph vessels?

Are composed of simple squamous cells, that slightly overlap, no basement membrane

10

Lymph vessels are _____ permeable than capillaries.

More

11

Where aren't lymph vessels found?

CNS, bone marrow, cartilage, epidermis, cornea, teeth

12

Can fluid escape from lymph vessels?

No

13

What is a special name for lymph capillary found in the villi of the small intestine?

Lacteal vessel

14

What are transported by the lacteal lymph vessels?

Products of lipid metabolism

15

What happens to most absorbed fats?

Most fat enters the lymphatic vessels and is eventually emptied into the venous blood in the neck region via the thoracic duct, which drains the digestive viscera.

16

After meals, lacteal lymph is _____ due to absorbed fats.

White

17

What are the two lymphatic ducts?

Thoracic duct
Right lymphatic duct

18

What does the thoracic duct drain?

Lower limbs and abdomen
Left thorax
Left upper extremity
Left side of head and neck

19

Which lymphatic duct is larger?

Thoracic duct

20

What does the thoracic duct drain into?

Drains into left subclavian vein → l brachiocephalic vein → sup vena cava

21

What does the right lymphatic duct drain?

Right thorax
Right upper extremity
Right side of head and neck

22

Where does the right lymphatic duct drain to?

Empties into right subclavian vein → r brachiocephalic vein → sup. v.c.

23

What is lymphatic tissue made of?

Composed of aggregates of lymphocytes and macrophages

24

What isn't lymphatic tissue connected to?

Not connected to lymph vessels, lymphatic tissue is just a mass of cells

25

What is an example of a nodule of lymphatic tissue?

Peyer’s patches in the intestine

26

In what three areas can lymphatic tissue be found? (acronyms)

MALT- mucosa-associated lymphatic tissue
BALT-bronchus-associated lymphatic tissue
GALT- gut-associated lymphatic tissue

27

What is a lymph node?

Bean-shaped, has a capsule (unlike nodule), are hundreds of lymph nodes, are connected by lymphatic vessels

28

What do lymph nodes do? What allows them to do this?

Filters the lymph multiple times as the lymph flows to the subclavians
Contains lymphocytes- so “cleans” the lymph of foreign matter

29

In a lymph node, many afferent lymph vessels ______, just one efferent lymph vessel ______

enter
leaves

30

In a lymph node, many afferent lymph vessels ______, just one efferent lymph vessel ______

enter
leaves

31

What are the three lymphatic organs?

Spleen
Thymus
Tonsils

32

So the tonsil have capsules?

No, only partially encapsulated

33

What are patches of lymphatic tissue located at the entrance of pharynx?

Tonsils

34

What are the 4 kinds of tonsils?

palatine tonsil, lingual tonsil, pharyngeal tonsil, tubal tonsil

35

What is a tubal tonsil?

Tubal tonsils are tiny and surround the opening of the eustachian tube to throat