Chapter 24 Lymphatic system

Question 1

What is the importance of the lymphatic system in the cardiovascular system?

Answer 1

helps CV system by removing excess ISF leaked from capillaries

Question 2

Functions of the lymphatic system?

Answer 2

Transports fluids
Fights infections
Remives excess ISF
Transports dietary lipids
Aids in production and maturation of lymphocytes
Generates immune response

Question 3

How does the LS remove excess ISF?

Answer 3

Leaked fluid enters lymph vessel
and becomes Lymph
Lymph vessels return fluid to venous system

Question 4

How does the LS transport dietary lipids?

Answer 4

Transports through lymphatic capillaries called Lacteals which absorb lipids in the intestine

Question 5

Lymphatic capillary structure?

Answer 5

Lymphatic capillaries converse into lymphatic vessels which have valves to prevent lymph form backflowing

Question 6

Order lymph travels?

Answer 6

Lymphatic capillaries –> Lymphatic vessels –> lymph nodes –> lymph trunks

Question 7

What are lymph trunks?

Answer 7

United lymphatic vessels after lymphnodes

Question 8

What are the 5 principle trunks?

Answer 8

1. Jugular trunks
2. Subclavian trunks
3. Bronchomediastinal trunks
4. Intestinal trunks
5. Lumbar trunks

Question 9

What does the Jugular trunk drain?

Answer 9

Head and neck

Question 10

What does the subclavian trunks drain?

Answer 10

Upper limbs, breasts, superficial thoracic wall

Question 11

What does the Bronchomediastinal trunks drain?

Answer 11

deep thoracic structures

Question 12

What does the intestinal trunks drain?

Answer 12

Most abdomnial structures

Question 13

What does the Lumbar trunks drain?

Answer 13

Lower limbs, abdominopelvic wall and pelvic organs

Question 14

What do the trunks form?

Answer 14

trunks form through fusion 2 lymphatic ducts

Question 15

What are the 2 lymphatic ducts?

Answer 15

1. Right lymphatic duct
   2.Thoracic duct

Question 16

Where does the Right lymphatic duct return lymph from?

Answer 16

Right side of head and neck
Right upper limb
Right side of thorax

Question 17

Where does the thoracic duct return lymph from?

Answer 17

Most of body except places drained by right lymphatic duct
starts off as sac structure called Cisterna chyli
Largest lymphatic vessel

Question 18

what are the 4 Lymphoid cells

Answer 18

1. Macrophages
2. Nurse/epithelial cells
3. Dedritic cells
4. Lymphocytes

Question 19

macrophages function?

Answer 19

Phagocytosis, engulf foreign invaders

Question 20

Nurse cells function?

Answer 20

Secretetory cells in thymus

Question 21

Dendritic cells function?

Answer 21

Internalize antigens and present them to lymphocytes

Question 22

What are the 3 types of lymphocytes?

Answer 22

1. T-cells
2. B-cells
3. NK-cells

Question 23

What do T-cells do?

Answer 23

detect virally infected cells and cancer cells

Question 24

What do B cells do?

Answer 24

produce antibodies gainst baceria

Question 25

What do NK-cells do

Answer 25

Killer cells Detect cancer cells

Question 26

What are major lymphatic tissues?

Answer 26

Lymphnodes, Thymus and Spleen

Question 27

What structure of the Thymus?

Answer 27

Consists of capsule, trabeculae, lobules (Cortex and Medulla)

Question 28

What lymphoid cells are in Thymus Cortex?

Answer 28

Immature T-cells Macrophages Nurse cells

Question 29

What lymphoid cells are in Thymus Medulla?

Answer 29

Mature T-cells Nurse Cells

Question 30

What is the structure of the Lymphnodes?

Answer 30

Capsular extensions with trabeculae -divide node into compartments Stroma capsule, trabeculae, reticular fibers and fibroblasts Divided into medulla and cortex

Question 31

What lymphoid cells are in Lymphnode cortex?

Answer 31

T-cells B-cells Dendritic cells Macrophages

Question 32

What lymphoidcells are in lymph node medulla?

Answer 32

B-cells Macrophages

Question 33

What is the Structure of the spleen?

Answer 33

(Largest lymphatic organ) Splenic artery and vein enter via hilum Capsule and trabeculae Trabeculae vessels Branches of splenic artery/vein extend within trabeculae

Question 34

What do the cells areounf the trabeculae of the spleen subdivide into?

Answer 34

red pulp and white pulp red pulp surrounds white pulp clusters

Question 35

What lymphoid cells are in red pulp?

Answer 35

T cells B cells macrophages RBC

Question 36

Red pulp functions?

Answer 36

1. remove worn out blood cells and platelets (macrophages) 2. Store platelets 3. produce blood cells during fetal life

Question 37

What lymphoid cells are in White pulp?

Answer 37

T-cells B-cells Macrophages

Question 38

White pulp function?

Answer 38

Immune response

Question 39

Splenic cords/Billroth's cord

Answer 39

tissue located between red pulps blood filled sinues and the spleen

Question 40

What are the spleens functions?

Answer 40

-Iniate immune response to antigens -stores RBCs and platelets -get rid of old RBC, old Platelets, bacteria and foreign materials

Question 41

Thymus functions?

Answer 41

Surveillance and immune protection

Question 42

Lymphn nodes function?

Answer 42

Store lymphocytes that attack harmful invaders Filters Lymph Get rid of damaged/cancer cells