ANP 1105 Chapter Notes - Chapter 20: Hemostasis, White Pulp, Regulatory T Cell

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1105
• Professor: Joanne Savory

Document Summary

Anp1105 a dr. joanne savory and dr. m zeroual. Lymphatic system returns fluids leaked from blood vessels back to the blood; consists of: Network of drainage lymphatic vessels (lymphatics) that circulate to collect excess protein- containing interstitial fluid; once interstitial fluid enters lymphatics it becomes lymph. Lymph: fluid contained in lymphatic vessels (clear water) Lymph nodes: cleanse lymph as it passes through them. Lymphoid organs and tissues provide structural basis of immune system by housing phagocytic cells and lymphocytes (cid:894)(cid:271)ody(cid:859)s defe(cid:374)se (cid:373)e(cid:272)ha(cid:374)is(cid:373)s a(cid:374)d resista(cid:374)(cid:272)e to disease(cid:895) Structures include spleen, thymus, tonsils, lymph nodes. Fluid that remains behind in the tissue (reabsorbed by venous ends in capillary beds) is interstitial fluid; ~3l/day of fluid is in tissue spaces. Vessels offer a one-way system, ensuring lymph flows only toward heart. Lymph vessels include capillaries and larger lymphatic vessels: lymphatic capillaries blind-ended vessels that weave btwn tissue cells and blood capillaries. Widespread; absent from bones, teeth, bone marrow, and entire cns.