blood vessel final exam review

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Biological Sciences
Stefan Rusyniak

Blood Vessels Lecture 7 o Focusing on the blood vascular system theres also the lymph vascular system Circulatory System o Divided into 3 main parts o Cardiac musclehave their own vascular system o Maintain homeostasiso Distributes hormones and components of the immune system Arteries and Veins structure differences is important STRUCTURE REFLECTS THE NEED o Artery y Blood here is high in pressureVeins blood flowing against gravityThere will be specialization that allows this to happen such as valves and keeps it pumping blood back to the heart Veins are storage of the blood diameter of a vein is a lot bigger than an artery Organization wise it is very similar between the two General Organization Blood vessels have 3 main layers 1 Tunica Intima y Inner potion y Endothelium first layer o Very thin and hard to see under the EM o Simple squamous epitheliumo Important function they have antithrobogenic propertiestend to prevent clotting from happening o Blood stream have lots of cells in it has various factors flowing through it enzymes and proenzyme o There is a constant balance of clotting and nonclotting o If things go out of balance there is clots being formed o Under normal conditions endopthelial cells prevent clotting by secreting factorso Provides frictionless surfaces and has nothing for blood stream to attach to when blood is passing threw o Changes completely when there is damage to the endothelial when its activated o Damage will allow endothelial cells to become Prothrobogenic will promote blood clotting if it is damaged o Growth factors present within platelets that allows regrow and repair of the damaged area o If introduced a bumpkink theres going to be turbulent and might settle at the kink that was produced by damaging o By accumulating lots of these clotting factors together there will probably be likely to clot even more o Growth of a blood clotdiagram o Blood clotthrombuso Damage resulting in a bump on the endothelium can also occursomething underneath the endothelial tissueo Thrombus can break off to become a embolus that will clog arteries downstream y Subendothelial connective tissue
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