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Lymphatic System I. Composition of Lymphatic System

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Presentation on theme: "Lymphatic System I. Composition of Lymphatic System"— Presentation transcript:

1 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 I. Lymphatic System 1.Composition 1) Lymph conducting vessels
2)Lymphatic organs 3) lymphoid tissue

3 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.

4 lymphatic vessels lymphatic trunks lymphatic ducts I. Lymph
Conducting Vessels lymphatic capillaries lymphatic vessels lymphatic trunks lymphatic ducts Changes from small diameter to large one

5 Lymphatic Trunks ( 9 in number
Right & Left jugular trunks Right & Left subclavian trunks Right & Left bronchomediastinal trunks Right & Left lumbar trunks Intestinal trunk

6 Thoracic Duct Origin: cisterna chyli End: L.venous angle
3) Drainage:6 trunks 4) Route: →aortic opening→ posterior mediastinum (→ right side→left side)→ cisterna chyli left venous angle

7 Right Lymphatic Duct 1) Drainage 3 lymphatic trunks (collecting lymph
from right and superior quarter of body) 2) End right venous angle

8 lymph nodes thymus tonsil spleen lymphatic tissue II. Lymphatic Organs
in digestive & respiratory tracts

9 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

10 2). Deep cervical 2. Main Lymph Nodes in Body LNs in Head & Neck
(Reviewing the veins in neck) 1) Superficial cervical nodes 2). Deep cervical lymph nodes

11 Outline of Lymph Nodes in Head and Neck
Superficial lateral cervical lymph nodes

12 Deep Lateral Cervical Lymph Nodes
1) Position: arranged along internal jugular V 2) Two groups divided by omohyoid muscle a. superior deep cervical lymph nodes ( jugulodigastric LN or angular LN )

13 b. inferior deep cervical lymph nodes Supraclavicular LN (Virchow LN
lying in the left venous angle)

14 LNs in Upper Limbs Axillary LNs 1. Anterior group 2. Lateral group 3. Dorsal group 4. Central group 5. Apical group

15 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

16 LNs in Abdomen (I) 1.Celiac LNs 2.R & L gastric LNs
3.R & L gastroepiploic LNs 4.Pyloric LNs 5.Hepatic LNs 6.Pancreaticosplenic LNs

17 LNs in Abdomen (II) Super. mesenteric LNs Infer. mesenteric LNs

18 LNs in Abdomen (III) Lumbar LNs Common iliac LNs External iliac LNs
Internal iliac LNs

19 LNs in Lower Limbs 1.Inguinal LNs 1) Superficial LNs (T--- shaped) Upper group Lower group 2) Profound LNs 2. Popliteal LNs

20 Thymus 3) Structure 4) Functions 1) Location in anterior part of
replaced by adipose tissue after sex maturation 2) Morphology two lobes A. gernerating T cells B. secreting hormone( lymphopoietin) 4) Functions in anterior part of superior mediastinum 1) Location Thymus

21 Tonsils lingual tonsil (Tonsillar ring) 1) Location 2) Composition
in the openings of digestive, respiratory & auditory tubes. 2) Composition Pharyngeal tonsil Tubal tonsil Palatine tonsil lingual tonsil (Tonsillar ring)

22 Spleen 1) Location: in the left hypochondriae region
of the abdomen, its long axis matching the course of the 10th rib

23 (2) Morphology 1) Two surfaces: visceral surface , hilum of spleen
2) Two borders: superior border, notches 3) Two extremities: anterior extremities

24 C. generating lymph cells (T & B cells )
(3) Functions A. processing aged RBC B. storing blood C. generating lymph cells (T & B cells ) D. partaking in immune responses


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