cells of immune systems -...
TRANSCRIPT
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CELLS AND ORGAN OF THE IMMUNE SYSTEMS
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INTRO. CELL&ORGAN HOW DISEASE TEST
1. Definition
2. Importanc
e
3. Type of
immunity
4. General
characteri
stic
Cell
1. Agranulocyte
• Lymphocyte
• Monocyte
2. Granulocyte
• Neutrophils
• Basophils
• Eosinophils
3. Dendritic cell
4. Mast cell
5. Others
Organ
1. Lymphoid
primer
• Bone
marrow
• Thymus
2.Lymphoid
secondary
• Lymphatic
Vessel
• Lymph
Nodes
1. Antigen
2. Antibody
3. Agglutinatio
n
4. Non-specific
immunity
• First barrier
• Scnd barrier
5. Specific
immunity
• Third barrier
6. cytokines
1. Hypersen
sitivity
2. HLA @
MHC
3. Immunol
ogical
disorder
1. Immun
oassay
2. immun
ofluore
scence
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Derived from pluripotent stem cell (forms in embryo during the first few weeks of life)
Stem cells migrate from embryo liver to bone marrow (differentiate to produce lymphoid stem cells call ‘colony forming unit’)
Bone marrow-sources of the precursor cells
CELLS OF THE IMMUNE SYSTEMS
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Development of Haemopoietic Cells
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White blood cells
The granulocytes include the neutrolphils, eosinophils, and basophils; the
agranulocytes include the lymphocytes and monocytes.
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Serum vs. Plasma
Serum: cell-free liquid, minus the clotting factors
Plasma: cell-free liquid with clotting factors in solution (must use an anticoagulant)
Components of blood
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Components of blood
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Mature within bone marrow and released into blood
Constitute approximately 65% of all white blood cells
Large no.of granules found in cytoplasm Appearance of granules under light microscope
(conventional staining) Basophils (intense blue staining) Eosinophils (red-staining granules) Neutrophils (granules unstained)
Granulocytes
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Polymorph nuclear cells (multilobed nuclei of granulocyte)
Majority of granulocyte (90-95%)
Phagocytosis
Short life span (hours)
Very important at “clearing” bacterial infections
Natural Immunity
Neutrophil
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3-5 % of ganulocytes
Kills Ab-coated parasites through degranulation
Involved in allergic inflammation
Double Lobed nucleus
Orange granules contain toxic compounds
Eosinophils
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0.5-1% of granulocytes
Might be “blood Mast cells’
A cell-killing cells
Blue granules contain toxic and inflammatory compounds
Important in allergic reactions
Basophils
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Monocytes
Lymphocytes
Agranulocytes
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Monocytes/Macrophage
5-10% of white blood cells Short half-life (24h in blood) Morphology is variable,
larger than neutrophils and lymphocyte.
Single nucleus and abundant granular cytoplasm
Phagocytosis and killing of microorganisms
Activation of T cells and initiation of immune response
Monocyte is a young macrophage in blood
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25-35% of white blood cells
Found in the blood, lymphoid organ or tissue and site of chronic inflammation.
Many types; important in both humoral and cell-mediated immunity
B-cells produce antibodies
T- cells
Lymphocytes
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Lymphocytes
B-lymphocytes Differentiate within
bone marrow
Role-recognition of macromolecule (antigen) through surface receptor (antibody)
Mature into plasma cells
Function as secretors of antibody
T-lymphocytes
Tymus matured lymphocytes
Distinguishing between self, foreign tissue and infectious agent
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Dendritic cell
Mast Cell
OTHERS IMMUNE CELLS
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Activation of T cells and initiate acquired immunity
Found mainly in lymphoid tissue
Function as antigen presenting cells (APC)
Most potent stimulator of T-cell response
Dendritic Cells
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Expulsion of parasites through release of granules
Histamine, leukotrienes, chemokines, cytokines
Also involved in allergic responses
Mast Cells
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Megakaryocyte
Platelet formation
Wound repair
Erythrocyte
Oxygen transport
Other Important Blood Cells
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ORGAN OF IMMUNE SYSTEM
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PRIMARY LYMPHOID ORGANS
Bone Marrow
Thymus
SECONDARY LYMPHOID ORGANS Lymphatic vessels
Lymph nodes
Mucosal associated lymphoid tissue (MALT)
Gut associated lymphoid tissue (GALT)
Spleen
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PRIMARY LYMPHOID
ORGANS (Production and maturation of lymphoid cells)
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Found in bone cavity
In babies – found in all actively growing bone.
Adult-most bone marrow are replace by non active bone matrix.
Bone marrow only found in skull, vertebrae, ribs, sternum and pelvis
Produces new blood cells, both red and white.
The bone marrow produces all blood cells from STEM CELLS, which mature into different types of white blood cells.
BONE MARROW
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Bone marrow consist of
Blood vessel
Adipocyte
Reticular cells
Developing RBC
Immune cells (WBC)
Development of blood cells is called hemopoiesis
Matured haemopoetic cell will go to blood stream.
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Development of Haemopoietic Cells
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This organ lays between your breastbone and your heart. It is responsible for maturing T-cells.
Location- anterior superior mediastinum, in front of the heart and behind the sternum.
Where precursor T-lymphocyte cell mature
THYMUS
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Divided into a an outer capsule
peripheral cortex
central medulla
Here lymphocyte mature into T-helper cells
T-cytotoxic cells
T-suppressor cells
T-memory
Thymus structure
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Thymus
Processing and maturation of special lymphocytes (white blood cells) called T-lymphocytes or T-cells,
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SECONDARY LYMPHOID
ORGAN (Lymphocyte maturation and
immunity production)
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Upper left abdomen under the stomach filters blood and removes any foreign particles
and old blood cells in need of replacement. When blood pass the spleen , macrophage will
sieve foreign matter and microorganism. Here B and T lymphocyte is activated and specific
antibodies is produce. A person missing a spleen may get sick more
often than one with a spleen.
SPLEEN
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Made of splenic pulp which is covered with elastic fibrous capsule.
Pulp is made of:
White pulp: splenic follicles with high concentration of lymphoid tissue
Red pulp: surrounding white pulp, consist of reticular fiber, blood vessel, white blood cells, red blood cells and macrophages.
Spleen Structure
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The red pulp is mostly used to store blood and break down old red blood cells.
The white pulp has the lymphatic function of filtering the blood from antigens.
Spleen
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Made of reticular cells (storage for lymphocyte known as lymphoid follicles)
F(X)
Sieve antigen and foreign material from blood.
Prevent from infection
Prevent spreading of harmful substance in the body
LYMPH NODES
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Mucosa associated lymphoid tissue (MALT) Involving upper and lower respiratory tract.
Naso-pharyngeal lymph nodes (adenoid)
Tonsillar lymph nodes
Bronchial lymph nodes
Peripheral lymph nodes
Gut associated lymphoid tissue (GALT) Intestinal tract
Peyer’s patches
LYMPH NODES
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Kedudukan nodus limfa
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Struktur nodus limfa
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Lymph nodes
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Lymphatic vessels
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Cells of immune systems
Types of immune cells?
Function , origins, percentage in blood
Organs of immune system
Types of organs
What made up of lymphoids systems?
Structure, location, function of each organs.
Objective Checks
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END OF STORY