lymphatic system Flashcards
the ability to ward off damage or disease through ourdefenses
Immunity
2 General Types of immunity
Innate Immunity
Adaptive Immunity
Slower, specific & has a memory
adapts or adjusts to handle a specific microbe
Adaptive Immunity
defenses that are present at birth
Fast, non-specific and no memory
Innate Immunity
Lymphocytes
T-cells & B-cells
Reticular connective tissue containing
lymphocytes
Lymphatic tissue
Interstitial fluid in lymphatic vessels
Lymph
FUNCTIONS of lymphatic system
Drains excess interstitial fluid
Transports dietary lipids. - lipid-soluble vitamins
(A, D, E, and K) absorbed by the GIT
Carries out immune responses.
Defenses that are present at birth
Fast, non-specific and no memory
INNATE IMMUNITY
Site for most immune responses occur in
Secondary organs
Secondary organs
Lymph nodes
Spleen
Lymphatic nodules (follicles)
Two lobed organ (bilobed)
Located in the mediastinum between the
sternum and the aorta
THYMUS
From tissue to veins
Pumped by muscle & respiratory pumps like
venous return
LYMPHATIC FLOW
Scattered throughout the body
Concentrated near mammary glands, axilla
&groinn Contain mature B-cells, T-cells,
dendritic cellsand macrophagesn Function as a
type of filter, trap foreign substancesq
macrophages destroy some foreignsubstances
by phagocytosisq lymphocytes destroy others by
immuneresponses
LYMPH NODES
Site where stem cells divide & become
immunocompetent
PRIMARY LYMPHATIC ORGANS
The spread of a disease from one part
of the body to another
Metastasis
Four main types of antimicrobial substances
INTERFERONS
COMPLEMENT SYSTEM
IRON-BINDING PROTEINS
ANTIMICROBIAL PEPTIDES
(alpha-, beta-, and gamma-IFN)
Interfere with viral reproduction in a cell
INTERFERONS
Enhance other immune actions
Break cell membranes
Attract phagocytes
Tag microbial cells for destruction
COMPLEMENT SYSTEM
Bind iron and starve bacteria
IRON-BINDING PROTEINS
Lyse microbes
ANTIMICROBIAL PEPTIDES
Between stomach & diaphragm
Contains blood filled venous sinuses and RBCs,
macrophages, lymphocytes plasma cells &
granular leukocytes
SPLEEN
SPLEEN Performs three functions related to blood cells namely;
- Removal by macrophages of ruptured,
worn out, or defective blood cells and
platelets - Storage of platelets, up to one-third of
the body’s supply - Production of blood cells (hemopoiesis)
during fetal life
Removal of the spleen
Splenectomy