1. Where is this?
2. What is this?
3. What type of tissue is the nasopharynx lined with?
4. What type of tissue is the oropharynx lined with?
5. Define a pneumothorax.
Fig. 22.1(TE Art)Spleen
Thymus
Thoracic duct
Lymphatic vessels
Palatine tonsil
Bone marrow
Lymph nodes
Functions of the lymph system
1. Fluid recovery2. Immunity3. Lipid absorption
Inversion of the ankle joint – ankle sprain
Anterior talofibular ligamentCalcaneofibular ligament
Edema and a typical ankle sprainEdema = increase in interstitial fluid in an organ
Peripheral edema
Fig. 22.3(TE Art)
Endothelial cell
Anchoringfilament
Lymph
Lymphaticcapillary
Lymphatic duct
Tissue fluid
High pressure in tissues – low pressure in lymph vesselInterstitial fluid flows into lymph capillariesFlow: arterioles – capillaries – interstitial fluid – lymph capillaries
Collecting ducts
Lymph node
Collecting vessel
Lymphatic capillaries
Flow of lymph – from tissues back to venous system
Fig. 22.6(TE Art)
L. subclavian v.
Thoracic duct
Cisterna chyli
Drainage of rightLymphatic duct
R. subclavian v.
R. lymphatic duct
Superior vena cava
Drainage of thoracicduct (left lymphatic duct)
Lymph drainage from left and right sides of the body is different
Fig. 22.12a(TE Art)Lymphatic nodule
Capsule
Efferentlymphaticvessel
Afferentlymphaticvessel
Trabecula
Lymph node
Spleen
Thymus
Thoracic duct
Lymphatic vessels
Palatine tonsil
Bone marrow
Lymph nodes
Lymphatic tissues• Diffuse lymphatic tissue• Lymph nodules
Lymphatic organs• Lymph nodes• Tonsils• Spleen • Red bone marrow• Thymus
Fig. 22.14a(TE Art)
Pharyngealtonsil
Palate
Palatinetonsil
Lingualtonsil
Tonsils: lymphatic nodules covered with an epithelium
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