PSL301H1 Lecture Notes - Lecture 2: Natural Killer Cell, Lymph Node, Lymphatic Vessel

• School: UTSG
• Department: Physiology
• Course: PSL301H1
• Professor: French, Gramolini, Richardson, Wong

Document Summary

Lecture 2 pathogens and innate immunity (pg. Our immune system: destroys pathogens foreign invaders, detects and kills abnormal cells (apoptosis) tumours, cancerous cells, remove cell debris from body cell debris and particles. There are different organs that are a part of the immune system included specialized lymphoid tissues and vessel systems. Wbc (white blood cells) can circulate through the blood but are also found in the tissues and lymphatic vessels. Commented [y3]: node well before the fluid gets back to the heart. Immune cells found in blood, lymph and tissues: lymphocytes broken into three categories, b lymphocytes, t lymphocytes, natural killer (nk) cells, monocytes macrophages, neutrophils, eosinophils and basophils. It has to get through two endothelial cells. Wbcs are attracted to areas of infection because of the chemicals released chemotaxis which allows the. Wbc to identify and phagocytize the foreign particle: chemotaxins e. g. bacterial toxins, products of tissue injury, and other cytokines released.