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3 main functions of blood transport, regulation, protection
composition of blood (2) plasma and formed elements (blood cells)
3 main plasma proteins albumin, fibrinogen, globulins
albumin maintains osmotic pressure of blood, most abundant of plasma proteins
fibrinogen plasma protein, clotting factors, hemostasis, mfg in liver
globulins plasma protein, main component of antibodies, protects us from infection, acts as carriers for molecules like fat
neutrophils WBC granulocyte, segmented and banded, most important role is phagocytosis, 10-12 hours lifespan
basophil WBC granulocyte, releases histamine, contains anticoagulants (heparin), 3-7 days lifespan
eosinophil WBC granulocyte, releases chemicals that destroy certain parasites, 12 hours-3 days lifespan
B-lymphocytes WBC agranulocyte, originates in bone marrow
T-lymphocytes WBC agranulocyte, originates in thymus gland
monocyte WBC agranulocyte, macrophage
thrombocytes (platelets) smallest blood cell, life span 5-9 days, produced in red bone marrow as fragments of megakaryocytes. Function - prevent blood loss, essential to hemostasis
hemostasis process that stops bleeding
3 events of hemostasis 1. Blood vessel spasm. 2. Formation of a platelet plug. 3. Blood clotting/coagulation
epicardium outer layer of the heart, consists of squamous epithelial cells that overlie connective tissue
pericardium tough fibrous sac that surrounds/protects heart, made up of fibrous and serous pericardium
myocardium middle layer of the heart, consists of striated muscle fibers that cause heart contractions "myocardial infarction" affects this
endocardium innermost layer of heart, consists of endothelial tissue w/ small blood vessels and smooth muscle bundles
chambers of the heart right atrium - receives deoxygenated blood from superior and inferior vena cava. left atrium - gets oxygenated blood from 4 pulmonary veins (arteries)
interventricular septum separates the right and left ventricles
function of heart valves regulation, prevent backflow
conductance vessels arteries
resistance vessels arterioles
the smallest and most numerous of all the blood vessels capillaries
blood vessels that carry deoxygenated blood back TO the heart veins
innermost layer of a blood vessel tunica intima
thick middle layer of blood vessel tunica media
tough outer layer of blood vessel tunica adventitia
primary function of large arteries to conduct blood AWAY FROM the heart to the arterioles
exchange vessels capillaries
capacitance vessels veins, carry deoxygenated blood back TO the heart
veins contain _________ that direct flow of blood in one direction 1-way valves
hepatic artery carries oxygenated blood TO the liver
hepatic portal veins carries DEOXYGENATED BLOOD to liver for detoxification before returning to heart
hepatic veins carry DEOXYGENATED BLOOD from liver -> inferior vena cava
great saphenous vein longest vein in body, merges w/ femoral vein, usually harvested for CAVGs
circle of Willis where branches from internal carotid arteries and basilar artery form a circle of arteries at base of the brain, supplying the brain with blood
aneurysms commonly occur where? at the Circle of Willis
right common carotid artery arises from the brachiocephalic artery
left common carotid artery arises directly from aortic arch
external carotid arteries supply superficial areas of face/neck/scalp
internal carotid arteries extend to the front part to the base of the brain
the blood flow to the stomach/spleen/pancreas/intestines/liver is referred to as...? splanchnic circulation
Created by: 1469838250