BIOL 152 1st Edition Lecture 22 Outline of Last Lecture Circulation Outline of Current Lecture Circulation Current Lecture Human Body Vessels typically have three layers of tissue 1 Endothelium 2 Smooth muscle 3 Connective tissue Blood Pressure Law of continuity fluid flows faster as total cross sectional area of pipe decreases Small area of arteries Capillaries larger surface area because of spread Velocity of blood flow highest in arteries veins capillaries lowest Pressure of blood flow highest in arteries capillaries veins lowest Factors Affecting Blood Pressure Smooth muscles constrict stress and dilate exercise vessels o Cardiac output adjusts as needed These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Salt intake Drugs Gravity Blood Connective tissue cells in extracellular matrix Matrix Plasma 55 of blood Function osmotic regulation transport defense o 90 water o Electrolytes o Proteins o Transported substances Cellular component o Erythrocytes biconcave lack nuclei hemoglobin o Leukocytes defense engulf and digest bacteria o Platelets fragments of bone marrow cells clotting Blood clotting Fibrinogen to fibrin Clotting factors from platelets Cardiovascular Disease Cholesterol travels in blood via o LDL bad o HDL Atherosclerosis Hypertension Heart attack Stroke Treatments for cardiovascular disease Drugs Antihypertensives Coronary Artery Bypass Surgery Percutaneous coronary intervention Angioplasty stents
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