Lymph

Question 1

Lymphatic vessels

Answer 1

elaborate network of drainage vessels

drain interstitial fluid or lymph from peripheral tissues into blood

Question 2

Lymphoid cells

lymphocytes, T & B cells

Answer 2

lymphocytes: cells of the adaptive immune system; mature into one of two main types ( T or B cells)

Question 3

Lymphoid cells

T & B cells

Answer 3

T cells: manage immune response, and some also attack and destroy infected cells

B cells: produce plasma cells, which secrete antibodies

Question 4

Lymphoid organs

Primary lymphoid organs

Answer 4

areas where T & B cells mature- red bone marrow and thymus
-T & B cells originate in bone marrow
*only B cells mature there
*T cells mature in thymus

Question 5

Lymphoid Organs

Secondary lymphoid organs

Answer 5

areas where mature lymphocytes first encounter their antigen and become activated

Question 6

Lymph nodes main function

1. Filter lymph

Answer 6

macrophages remove and destroy microorganisms and debris
*prevent unwanted substances from being delivered to the blood

Question 7

Lymph nodes functions

2.Immune system activation

Answer 7

place for lymphocytes to become activated and mount an attack against antigens

Question 8

What is a Buboes?

Answer 8

inflamed, swollen, tender lymph nodes

*nodes are overwhelmed by what they are trying to destroy
*swollen “glands”
*sometimes pus filled

gave the bubonic plague its name

Question 9

What is the largest lymphoid organ?

Answer 9

Spleen

Question 10

What are the functions of the Spleen for the lymph system?

Answer 10

-site of lymphocyte proliferation and immune surveillance and response
-cleanses blood of aged blood cells and platelets
*macrophages remove debris

Question 11

Spleen

White pulp: immune function

Answer 11

-contains mostly lymphocytes on reticular fibers
-white pulp clusters found around central arteries

Question 12

Spleen

Blood pulp: old blood cells and bloodborne pathogens are destroyed

Answer 12

-rich in RBCs and macrophages that engulf them
-composes of splenic cords (reticular tissue) that separate blood filled splenic sinusoids (venous sinuses)

Question 13

MALT

Mucosa-associated lymphoid tissue

Answer 13

-lymphoid tissues in mucous membranes throughout body
-protects from pathogens entering the body

Question 14

Largest collections of MALT (organs)

Answer 14

-tonsils
-Peyer’s path
-appendix

Question 15

Blood vessels: delivery system of dynamic structures

Answer 15

-begins and ends with the heart
-works with lymphatic system to circulate fluids

Question 16

Arteries

Answer 16

carry blood AWAY from the heart

-oxygenated except for pulmonary circulation and umbilical vessels of fetus

Question 17

Capillaries

Answer 17

direct contact with tissue cells

-directly serve cellular needs

Question 18

Veins

Answer 18

carry blood TOWARDS the heart

-deoxygenated except for pulmonary circulation and umbilical vessels of fetus

Question 19

Arterioles

Answer 19

smallest of all arteries

-larger arterioles contain all 3 tunics

*control flow into capillary beds via vasodilation and vasoconstriction of smooth muscle

Question 20

Oxygen rich blood is

Answer 20

red

Question 21

Oxygen poor blood is

Answer 21

blue

Question 22

Vasodilation

Answer 22

widening of blood vessels which increases blood flow

Question 23

Vasoconstriction

Answer 23

narrowing of blood vessels, caused by the contraction of smooth muscle cells in their walls

Question 24

Lymphatic System

Answer 24

returns interstitial fluid and leaked plasma proteins back to blood

Question 25

The lymphatic system consists of 3 parts

Answer 25

1.network of lymphatic vessels (lymphatics)
2.lymph: fluid in vessels
3.lymph nodes : cleanse lymph