lymphatic system i. composition of lymphatic system ii. functions of lymphatic system iii. lymphatic...
TRANSCRIPT
Lymphatic System
I. Composition of Lymphatic System
II. Functions of Lymphatic System
III. Lymphatic Conducting Vessels
IV. Lymphatic Organs
Guo Ling,MD,PhD
Department of Anatomy
2. Functions
1) Serving as an accessory system for return of fluid from the narrow space between tissues to the heart.
2) Producing lymphocytes & then participating in the immune responses.
I. Lymph Conducting Vessels
lymphatic capillaries
lymphatic vessels
lymphatic trunks
lymphatic ducts
Changes from small diameter tolarge one
Lymphatic Trunks ( 9 in number
Right & Left jugular trunks
Right & Left subclavian trunks
Right & Left bronchomediastinal trunks
Right & Left lumbar trunks
Intestinal trunk
Thoracic Duct 1) Origin: cisterna chyli 2) End: L.venous angle3) Drainage:6 trunks
4) Route:
→aortic opening→
posterior mediastinum
(→ right side→left
side)→left venous angle
cisterna chyli
Right Lymphatic Duct
1) Drainage
3 lymphatic trunks(collecting lymph from right and superior quarter of body)
2) End right venous angle
lymph nodes
thymus
tonsil
spleen
lymphatic tissue in digestive & respiratory tracts
II. Lymphatic Organs
Lymph Nodes (LNs)
1. Distribution principles of lymph nodes
① lying in the roots of the head, neck and extremities as well as in the organ hilums and mesenterium
② arranged along blood vessels & nerves
③ aggregating into groups
2. Main Lymph Nodes in Body
1) Superficial cervical nodes
2). Deep cervical lymph nodes
(Reviewing the veins in neck)
LNs in Head & Neck
1) Position: arranged along internal jugular V
a. superior deep cervical lymph nodes ( jugulodigastric LN or angular LN )
2) Two groups divided by omohyoid muscle
Deep Lateral Cervical Lymph Nodes
b. inferior deep cervical lymph nodes
Supraclavicular LN
(Virchow LN
lying in the
left venous angle)
LNs in Upper Limbs
1. Anterior group
2. Lateral group
3. Dorsal group
4. Central group
5. Apical group
Axillary LNs
LNs in Thorax
1.Anterior mediastinal LNs
2. Posterior mediastinal LNs
3. LNs in trachea,
bronchi & lungs :
1) Paratracheal LNs
2) Sup. tracheobronchial LNs
3) Inf. tracheobronchial LNs
4) Bronchopulmonary LNs
5) Pulmonary LNs
胰的淋巴管和淋巴结
1.Celiac LNs2.R & L gastric LNs3.R & L gastroepiploic LNs4.Pyloric LNs5.Hepatic LNs 6.Pancreaticosplenic LNs
LNs in Abdomen (I)
LNs in Lower Limbs
1.Inguinal LNs
1) Superficial LNs
(T--- shaped)
Upper group
Lower group
2) Profound LNs
2. Popliteal LNs
Thymus
3) Structure replaced by adipose tissue after sex maturation
2) Morphology
two lobes
A. gernerating T cellsB. secreting hormone( lymphopoietin)
4) Functions
in anterior part of superior mediastinum
1) Location
Tonsils
1) Location in the openings of digestive, respiratory & auditory tubes.
2) Composition Pharyngeal tonsil Tubal tonsil Palatine tonsil
lingual tonsil
(Tonsillar ring)
Spleen 1) Location: in the left hypochondriae region
of the abdomen, its long axis matching the course of the 10th rib
1) Two surfaces: visceral surface , hilum of spleen
2) Two borders: superior border, notches 3) Two extremities: anterior extremities
(2) Morphology