Cardiovascular Changes at Birth

Cardiovascular Changes at Birth - Lymphatic vessels...

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Cardiovascular Changes at Birth Lungs and pulmonary vessels expand Ductus arteriosus constricts and becomes ligamentum arteriosum A valvular flap closes the foramen ovale Aging and the Cardiovascular System Age-related changes in blood may include Decreased hematocrit Constriction or blockage of peripheral veins by a thrombus Pooling of blood in the veins of the legs Vessels are less elastic, prone to Ca 2+ deposits and thrombi formation The Lymphatic System and Immunity An Overview of the Lymphatic System and Immunity lymphatic system •The lymphatic system •Contains cells, tissues, and organs responsible for defending the body •Lymphocytes resist infection and disease by responding to •Invading pathogens such as bacteria or viruses •Abnormal body cells such as cancer cells •Foreign proteins such as toxins Organization of the Lymphatic System The lymphatic system consists of •Lymph
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Unformatted text preview: Lymphatic vessels Lymphoid tissues and organs Lymphocytes and supporting phagocytic cells Functions of lymphatic system Primary function is production, maintenance, and distribution of lymphocytes Lymphocytes must: Detect where problems exist Be able to reach the site of injury or infection Lymphatic vessels include Lymphatic capillaries Small lymphatic vessels Major lymph-collecting vessels Major lymph-collecting vessels Superficial and deep lymphatics Thoracic duct Cisterna chyli Right lymphatic duct Lymphocytes Three classes of lymphocytes T ( t hymus dependent) cells B ( b one marrow-derived) cells NK ( n atural k iller) cells Lymphocyte production (lymphopoiesis) Involves bone marrow, thymus, and peripheral lymphoid tissue B cells and NK cells mature in bone marrow T cells mature in the thymus...
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This note was uploaded on 11/22/2011 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.

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Cardiovascular Changes at Birth - Lymphatic vessels...

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