بافتها و اعضاء سيستم لنفاوي lymphoid organs 1 primary (central) lymphoid...
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بافتها و اعضاء سيستم لنفاويبافتها و اعضاء سيستم لنفاوي Lymphoid Organs 1Lymphoid Organs 1
•Primary (Central) Lymphoid OrgansPrimary (Central) Lymphoid Organs
((Lymphocytes are generated)Lymphocytes are generated)
•Bone MarrowBone Marrow
•ThymusThymus
Primary (Central) Lymphoid Primary (Central) Lymphoid OrgansOrgans
استخوان استخوان مغز Bone MarrowBone Marrowمغزدر سنين پايين در همه استخوانهادر سنين پايين در همه استخوانهادر سنين باال در استخوانهاي دراز از بين مي روددر سنين باال در استخوانهاي دراز از بين مي رود محل بلوغ لنفوسيتهاي محل بلوغ لنفوسيتهايBBاست است
تيموس تيموسThymusThymus در سنين پايين فعال است و در سن باال تحليل مي روددر سنين پايين فعال است و در سن باال تحليل مي رود محل بلوغ لنفوسيتهاي محل بلوغ لنفوسيتهايTTاست است
Thymus
• small in an adult• site of T lymphocyte production• secretes thymosins
16-14
Figure 1-7
Secondary (Peripheral) Lymphoid Secondary (Peripheral) Lymphoid OrgansOrgans
•Lymphatic Vessels & Capillaries (Lymphatic Vessels & Capillaries (Lymphatic System )
•Lymph nodesLymph nodes
•SpleenSpleen
•Lymphoid tissues associated with mucosaLymphoid tissues associated with mucosa
1.1. Gut associated Tonsils, Gut associated Tonsils,
2.2. Peyers PatchesPeyers Patches
3.3. AppendixAppendix
4.4. Lymphoid Lymphoid FolliclesFollicles (Bronchial-Associated Lymphoid (Bronchial-Associated Lymphoid
Tissue (BALT), Mucosal-Associated Lymphoid Tissue Tissue (BALT), Mucosal-Associated Lymphoid Tissue
(MALT)(MALT)
Figure 1-7
Lymph Function
•Absorption of dietary fats & transports fats to
bloodstream
•Delivers foreign particles to lymph nodes
•Network of vessels that assist in circulating fluids
•Transports excess fluid away from interstitial spaces
•Transports fluid to the bloodstream
•Help defend the body against diseases
Lymphatic Pathways
Lymphatic Pathways
Lymph Movement
• action of skeletal muscles
• respiratory movements
• smooth muscle in larger
lymphatic vessels
• valves in lymphatic
vessels
Lymphatic Capillaries
• microscopic• closed-ended tubes• in interstitial spaces of most tissues
Tissue Fluid and Lymph
Lymph tissue fluid
that has entered a
lymphatic capillary
Lymphatic Vessels
•Lymphatic vessels merge into lymphatic trunks• lymphatic trunks drain into collecting ducts
•Thoracic duct•Right lymphatic duct
Lymphatic Ducts
Figure 1-8 part 1 of 2
Lymph Nodes
Figure 1-8 part 2 of 2
Lymph Nodes
• cervical region• axillary region• inguinal region• pelvic cavity• abdominal cavity• thoracic cavity• supratrochlear region
16-12
Functions of Lymph Nodes
• filter potentially harmful particles
from lymph• immune surveillance by
macrophages and lymphocytes• areas of lymphocyte production
16-13
Spleen
• largest lymphatic organ• upper left abdominal quadrant• sinuses filled with blood• white pulp
• lymphocytes• red pulp
• red blood cells• lymphocytes• macrophages
16-15
Figure 1-9
Figure 1-9 part 1 of 3
Figure 1-9 part 2 of 3
Figure 1-9 part 3 of 3
Figure 1-10
Figure 1-10 part 1 of 2
Figure 1-10 part 2 of 2