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 lowestFactors Affecting Blood Pressure- Smooth muscles constrict (stress) and dilate (exercise) vesselso Cardiac output adjusts as neededThese 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- GravityBlood- Connective tissue (cells in extracellular matrix)- Matrix = Plasma (55%of blood)- Function = osmotic regulation, transport, defense o 90% watero Electrolyteso Proteinso Transported substancesCellular componento Erythrocytes – biconcave, lack nuclei, hemoglobin o Leukocytes – defense, engulf and digest bacteria o Platelets – fragments of bone marrow cells, clottingBlood clotting- Fibrinogen to fibrin- Clotting factors from plateletsCardiovascular Disease- Cholesterol travels in blood viao LDL - bado HDL - Atherosclerosis- Hypertension- Heart attack- StrokeTreatments for cardiovascular disease- Drugs- AntihypertensivesCoronary Artery Bypass Surgery- Percutaneous coronary intervention- Angioplasty,
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