2Arterial Branches of Systemic Circulation All are branches from aorta supplying arms, head, lower limbs and all viscera with O2 from the lungsAorta arises from left ventricle (thickest chamber)4 major divisions of aortaascending aortaarch of aortathoracic aortaabdominal aorta
3Aorta Ascending aorta leaves left ventricle Arch of Aorta Brachiocephalic trunkRight Common CarotidRight subclavianLeft Common CarotidLeft SubclavianThoracic aorta-from arch to diaphragmAbdominal aortaAt level of L4 vertebra divides into left and right common iliac arteries which carry blood to lower limbs
4Aorta and Its Superior Branches Aorta is largest artery of the bodyascending aorta2 coronary arteries supply myocardiumarch of aorta -- branches to the arms & headbrachiocephalic trunk branches into right common carotid and right subclavianleft subclavian & left carotid arise independentlythoracic aorta supplies branches to pericardium, esophagus, bronchi, diaphragm, intercostal & chest muscles, mammary gland, skin, vertebrae and spinal cord
5Coronary CirculationRight & left coronary arteries branch to supply heart muscleanterior & posterior interventricular aa.
7Subclavian Branches Subclavian aa. pass superior to the 1st rib gives rise to vertebral a. that supplies blood to the Circle of Willis on the base of the brainBecome the axillary artery in the armpitBecome the brachial in the armDivide into radial and ulnar branches in the forearm
9Common Carotid Branches Circle of WillisExternal carotid arteriessupplies structures external to skull as branches of maxillary and superficial temporal branchesInternal carotid arteries (contribute to Circle of Willis)supply eyeballs and parts of brain
10Abdominal Aorta and Its Branches Supplies abdominal & pelvic viscera & lower extremitiesceliac aa. supplies liver, stomach, spleen & pancreassuperior & inferior mesenteric aa. supply intestinesrenal aa supply kidneysgonadal aa. supply ovaries and testesSplits into common iliac aa at 4th lumbar vertebraeexternal iliac aa supply lower extremityinternal iliac aa supply pelvic viscera
11Visceral Branches off Abdominal Aorta Celiac artery is first branch inferior to diaphragmleft gastric artery, splenic artery, common hepatic arterySuperior mesenteric artery lies in mesenterypancreaticoduodenal, jejunal, ileocolic, ascending & middle colic aa.Inferior mesenteric arterydescending colon, sigmoid colon & rectal aa
13Common Iliac Arteries branch into External Iliac arteries that go on to supply the lower limbs and Internal Iliac arteries that supply uterus, prostrate, buttock muscles and bladderExternal Iliac becomes femoral artery after inguinal ligament, than popliteal at the knee and than divides into anterior and posterior tibial arteries in the leg
14Arteries of the Lower Extremity External iliac artery become femoral artery when it passes under the inguinal ligament & into the thighfemoral artery becomes popliteal artery behind the knee
17Veins of the Systemic Circulation Drain blood from entire body & return it to right side of heartDeep veins parallel the arteries in the regionSuperficial veins are found just beneath the skinAll venous blood drains to either superior or inferior vena cava or coronary sinus
18Major Systemic Veins All empty into the right atrium of the heart superior vena cava drains the head and upper extremitiesinferior vena cava drains the abdomen, pelvis & lower limbscoronary sinus is large vein draining the heart muscle back into the heart
19Veins of the Head and Neck External and Internal jugular veins drain the head and neck into the superior vena cavaDural venous sinuses empty into internal jugular vein
20Venipuncture is normally performed at cubital fossa, dorsum of the hand or great saphenous vein in infants
21Hepatic Portal Circulation A portal system carries blood between two capillary networks, in this case from capillaries of the gastrointestinal tract to sinusoids of the liver.The hepatic portal circulation collects blood from the veins of the pancreas, spleen, stomach, intestines, and gallbladder and directs it into the hepatic portal vein of the liver before it returns to the heart.enables nutrient utilization and blood detoxification by the liver.
22Hepatic Portal System Subdivision of systemic circulation Detours venous blood from GI tract to liver on its way to the heartliver stores or modifies nutrientsFormed by union of splenic, superior mesenteric & hepatic veins