Chapter 20 The Lymphatic System Florence Rena Saba

Chapter 20: The Lymphatic System

Florence Rena Saba – 1871 -1953 - discovered important link between blood vessel and lymphatic vessel genesis

Figure 20. 1: Distribution and special structural features of lymphatic capillaries, p. 774. Venous system Heart Arterial system Venule Loose connective tissue around capillaries Arteriole Lymph duct Lymph trunk Lymph node Lymphatic system Lymphatic collecting vessels, with valves Lymphatic capillary Tissue fluid Tissue cell (a) Blood capillaries Blood Lymphatic capillaries capillary Filaments anchored to connective tissue Endothelial cell Flaplike minivalve Fibroblast in loose connective tissue (b) Human Anatomy and Physiology, 7 e by Elaine Marieb & Katja Hoehn Copyright © 2007 Pearson Education, Inc. , publishing as Benjamin Cummings.

Figure 20. 2 a: The lymphatic system, p. 776. Regional lymph nodes: Cervical nodes Axillary nodes Entrance of right lymphatic duct into right subclavian vein Internal jugular vein Entrance of thoracic duct into left subclavian vein Thoracic duct Aorta Cisterna chyli Lymphatic collecting vessels Inguinal nodes (a) Human Anatomy and Physiology, 7 e by Elaine Marieb & Katja Hoehn Copyright © 2007 Pearson Education, Inc. , publishing as Benjamin Cummings.

Figure 20. 4: Lymph node, p. 778. Afferent lymphatic vessels Cortex: • Lymphoid follicle • Germinal center • Subcapsular sinus Efferent lymphatic vessels Follicles Trabecula Subcapsular sinus (a) Human Anatomy and Physiology, 7 e by Elaine Marieb & Katja Hoehn Capsule Hilum Medulla: Capsule • Medullary cord • Medullary sinus Medullary cords Medullary Trabeculae sinuses (b) Copyright © 2007 Pearson Education, Inc. , publishing as Benjamin Cummings.

Figure 20. 5: Lymphoid organs, p. 779. Tonsils (in pharyngeal region) Thymus (in thorax; most active during youth) Spleen (curves around left side of stomach) Peyer’s patches (in intestine) Appendix Human Anatomy and Physiology, 7 e by Elaine Marieb & Katja Hoehn Copyright © 2007 Pearson Education, Inc. , publishing as Benjamin Cummings.