Transcript circ_immune
Circulatory System •Replenishes nutrients to interstitial •Removes waste from the interstitial •Transports hormones Blood Pressure Makes Exchange Possible In Large Arteries Systolic 120 Diastolic 80 Spleen? The Heart Creates The Force That Moves The Blood Four Chambers = 2 pathways Systemic Pathway: •Aorta to body = High O2 & low CO2 •Vena cavas Back From Body = Low O2 & High CO2 Pulmonary Pathway: •Pulmonary Artery to lungs = Low O2 & High CO2 •Pulmonary Vein back from lungs= High O2 & low CO2 Atria receive blood & fill ventricles to capacity Ventricles pump blood to body tissues Valves insure one way flow Separation of pathways insures no mixing of CO2 blood with O2 blood and maximizes the O2 brought to the tissues = warm bloodedness (birds and mammals only) Blood Vessels Resistance of blood flow = pressure Arteries: •Carries blood to body tissues •Elastic tissue absorbs heart pumping pressure and maintains continuous flow •Smooth Muscle varies amount of blood flow & blood pressure Capillaries: •Walls are one cell thick and allows easy movement of nutrients out & wastes in - very extensive Veins: •Carries blood back to heart •Valves insure one way movement •BP is very low in these vessels - muscles help milk blood back to heart Excessive consumption of cholesterol or the inability to process it, can lead to plaque build up inside blood vessels Raising BP & adding strain on the Heart HYPERTENSION Blood Cellular Component - made in marrow •Red Blood Cells - transport O2 (hemoglobin) •White Blood Cells - destroy foreign material •Platelets - initiate clotting Non Cellular Component - Plasma •Organic Molecules - (amino acids,sugar,nucleotides,lipids) •Proteins - (clotting factors, antibodies) •Electrolytes - (Na+, K+, Ca+, Cl-) •Cellular Waste - (urea, CO2) •Hormones - (insulin, thyroxin, GH, Adrenalin, Cortisol….) •Water White Blood Cells Macrophage - (Eat foreign invaders and clean up debris) Neutrophil - (Release enzymes that kill microbe invaders) Eosinophil - (Release chemicals that attack parasites - worms) Basophil - (release histamines & protaglandins which attract other WBCs) inflamation Lymphocytes - (initiate immune response - antibody production) •T-Cells - (Activate B cells to begin producing antibodies) •B-Cells - (produce antibodies and form ”Memory Cells”) Immune Response Vaccination? Lymphatic System Series of vessels that collect fluid that has escaped the circulatory system (lymph) - 3 primary functions •removal of excess fluids from body tissues - returning it to circulation by dumping fluid into subclavian veins •absorption of fatty acids and transport of fat •production of immune cells such as lymphocytes Fluid is under low pressure and requires the contraction of skeletal muscles to support movement - valves insure movement back toward chest Swollen Glands - Indication of Infection Elephantiasis - parasitic worms lodged in lymph vessels block return flow of lymph leading to swelling Mumps - viral First Line Of Defense - structures that Help prevent access to pathogens Skin •Dead layer of impermeable cells •Oil glands •Sweat glands Mucus Membranes Mucus membranes capture bacteria before they get into vulnerable tissues - numerous macrophages can be found here Tears Hair Trap and deflect Substances before they get into sensitive areas Tears contain an enzyme (lysozyme) that breaks down the cell walls of bacterai