Download MBBS (Bachelor of Medicine, Bachelor of Surgery) 1st Year, 2nd Year, 3rd Year and Final year Surgery 37 Lymphatic System PPT-Powerpoint Presentations and lecture notes
Lymphatic system
DEPT OF SURGERY
Lymph
What is lymph ?
Tissue fluid (interstitial fluid) that enters the
lymphatic vessels
Formation and transport of tissue fluid
Lymphatic system
Essentially a drainage
system accessory to
venous system
larger particles that escape into
tissue fluid can only be removed
via lymphatic system
Functions
?Network that filters antigens from the interstitial fluid
?Primary site of immune response from tissue antigens
?Lymphatic drainage in al organs of the body except brain, eyes, marrow
and cartilage
?Flaccid thin wal ed channels progressive caliber
?600 lymph nodes in body
?Slow flow, low pressure system returns interstitial fluid to the blood system
Components of lymphatics
? Lymph
? Lymphatic Vessels
? Lymphatic Organs
? Lymphatic cells
Secondary lymphoid tissue
Lymphatic Capil aries
24-
8Features of structure:
Blind end
Single layer of overlapping endothelial
cells
More permeable than that of blood
capillary
Absent from avascular structures, brain,
spinal cord splenic pulp and bone
marrow
Lymphatic Vessels
24-
9
?Three layered wall but thinner
than vein
?More numerous valves than
in vein
?Interposed by lymph nodes at
intervals
?Arranged in superficial and
deep sets
Lymph Trunks
? Right and left jugular trunks
? Right and left subclavian trunks
? Right and left bronchomediastinal trunks
? Right and left lumbar trunks
? Intestinal trunk
Lymphatic Ducts
Right lymphatic duct
Thoracic duct
Lymphatic Cel s
24-
12 Also called lymphoid cells
Located in both the lymphatic system and the cardiovascular
system.
Work together to elicit an immune response.
Types of lymphatic cells are:
? Macrophages
? Epithelial cells
? Dendritic cells
? Lymphocytes
Lymphatic Organs
Primary organs
?Red bone marrow
?Thymus gland
Secondary organs
?Lymph nodes
?Lymph nodules
?Spleen
Lymph nodes
Capsular shel
Fibroblasts and reticulin
fibers
Macrophages
Dendritic cel s
T cel s
B cel s
Head & Neck Nodes
Axil ary Nodes
Inguinal Lymph nodes
Lymphangitis
Inflammation of the lymph vessels
Commonest cause bacteria called streptococcus
pyogenes(most common).
Lymph vessels appear as red streaks through the
skin
Filariasis
Lymphedema
Occurs due to accumulation of
lymphatic fluid in the interstitial
tissue
Sometimes can be appreciated
after wearing tight clothing or
jewellary on affected limb
Lymphadenopathy
Means a disease of the
lymph nodes
Lymph nodes become
swollen/ enlarged and
may be painful to touch
Lymphomas
Cancers originating either
from the lymphocytes in the
lymph nodes or the
lymphatic tissue in organs
Tonsil itis
Infection of the pharyngeal
tonsils
Tonsils are swollen,
Fever and pain during
swallowing usually present
This post was last modified on 08 April 2022