Immune system Flashcards
What does the Immune system does
works to defend body against
internal and external threats
What 2 systems work together in immunity
Immune and lymphatic systems
What does the immune system consists of
1) Contains no organs or tissues
2) Instead consists of cells and proteins in blood and tissues of other systems
3) including lymphatic system
What formed elements does the immune system has
1) leukocytes, or white blood cells (WBCs)
2) immune proteins located in plasma
What is immunity?
is the ability to ward off damage or disease through our defenses
What is susceptibility
lack of resistance
What are the two general types of immunity
Innate (nonspecific)
Adaptive (specific)
What is innate (nonspecific) immunity
1) nonspecific defense mechanisms that come into play immediately or
within hours of an antigen’s appearance in the body.
2) Physical barriers such as skin, chemicals in the blood, and immune system cells that attack foreign cells in the body
What is adaptive (specific) immunity
1) antigen-specific immune response
2) More complex than nonspecific
3) The antigen first must be processed and recognized. Once an antigen has been recognized, the adaptive immune system creates an army of immune cells specifically designed to attack that antigen.
4) Adaptive immunity also includes a “memory” that makes future responses against a specific antigen more efficient.
(long memory, when you do not have to put more than 1 vaccine)
What is the Lymphatic system
group of organs and tissues that not only works with immune system but also participates in number of functions such as fluid
homeostasis
What are the two main components of the lymphatic system
1) lymphatic vessels
2) lymphatic tissue and organs
What are the Lymphatic vessels
system of blind-ended tubes
What are some components of the Lymphatic tissue and organs
includes clusters of lymphoid follicles such as
1) Tonsils
2) Lymph nodes
3) Spleen
4) Thymus
What are the major functions of the lymphatic system
1) Regulation of interstitial fluid volume
- interstitial fluid and lymph are similar in composition
- returns fluid and any leaked plasma proteins to the blood
2) Absorption of dietary fats
3) Immune functions
- lymphoid organs filter pathogens from lymph and blood antigens provoke responses by B cells, plasma cells (which produce antibodies),
memory B cells, and several types of T cells including helper T cells, cytotoxic T cells, regulatory T cells and memory T cells
Where is the lymph collected
In vessels called lymph-collecting vessels
lymph-collecting vessels merge to form what
lymph trucks
How many lymph trunks drain lymph from specific body
regions
9 1) lumbar trunks 2) Intestinal trunk 3) Jugular trunk 4) Bronchomediastinal trunks 5) Subclavian trunks 6)
Where does the lumbar trunks receive lymph from
receive lymph from lower limbs and pelvic area
Where does the Intestinal trunk receives lymph from
receives fat-containing lymph from small lymphatic vessels—in small intestine
Where does Broncho mediastinal trunks receive lymph from
Receive lymph from thoracic cavity
Where does the Subclavian trunks receive lymph from
receive lymph from upper limbs
Where does the Jugular trunks receive lymph from
receive lymph from head and neck
Where does the Intestinal trunk and lumbar trunks
all drain into
a large, swollen vessel called cisterna chyli
Cisterna chyli and trunks from left side of
body drain into which duct?
thoracic duct
