Remember….. Quiz #5 available until Monday at 11 pm

Where is this? 2. What is this? 3. What type of tissue is the nasopharynx lined with? What type of tissue is the oropharynx lined with? 5. Define a pneumothorax.

definition of the lymph system lymph vessels lymph nodes lymph nodules tonsils spleen

Fig. 22.1(TE Art) Palatine tonsil Lymph nodes Spleen Thymus Functions of the lymph system Fluid recovery Immunity Lipid absorption Thoracic duct Bone marrow Lymphatic vessels

Edema and a typical ankle sprain Edema = increase in interstitial fluid in an organ Peripheral edema Inversion of the ankle joint – ankle sprain Anterior talofibular ligament Calcaneofibular ligament

Fig. 22.3(TE Art) Lymphatic Tissue fluid capillary Lymph Anchoring filament Lymphatic duct Endothelial cell High pressure in tissues – low pressure in lymph vessel Interstitial fluid flows into lymph capillaries Flow: arterioles – capillaries – interstitial fluid – lymph capillaries

Larger lymph vessels…. Have valves Have tunica interna, media and externa

Flow of lymph – from tissues back to venous system Collecting ducts Lymph node Collecting vessel Lymphatic capillaries

Drainage of right Lymphatic duct Fig. 22.6(TE Art) R. lymphatic duct L. subclavian v. R. subclavian v. Thoracic duct Superior vena cava Cisterna chyli Drainage of thoracic duct (left lymphatic duct) Lymph drainage from left and right sides of the body is different

Thoracic duct Left subclavian vein

Lymph nodes Lymphatic vessels

Fig. 22.12a(TE Art) Lymph node Capsule Lymphatic nodule Afferent vessel Efferent lymphatic vessel Trabecula

Cervical lymph nodes Axillary lymph nodes Inguinal lymph nodes

Lymph nodes

Axillary nodes Metastasis Lymphedema

Palatine tonsil Spleen Lymph nodes Thymus Thoracic duct Bone marrow Lymphatic tissues Diffuse lymphatic tissue Lymph nodules Lymphatic organs Lymph nodes Tonsils Spleen Red bone marrow Thymus Thoracic duct Bone marrow Lymphatic vessels

Lymph nodule: dense mass of lymphocytes and macrophages come and go as pathogens invade

Fig. 22.14a(TE Art) Pharyngeal tonsil Palate Palatine tonsil Lingual Tonsils: lymphatic nodules covered with an epithelium Fig. 22.14a(TE Art) Pharyngeal tonsil Palate Palatine tonsil Lingual tonsil

Spleen: largest lymphoid organ red pulp: erythrocytes (RBC’s) white pulp: lymphocytes and macrophages produce blood cells in fetus monitor blood for antigens RBC storage “erythrocyte graveyard” splenectomy

Remember….. Quiz #5 available until Monday at 11 pm