Blood Vessels List for Test III Physiology 2B Dr. Pavlovitch Pulmonary Circulation Pulmonary artery or trunk r/l pulmonary arteries r/l pulmonary veins Systemic Circulation—Arteries Ascending Aorta Branches r/l coronary arteries circumflex artery anterior descending (interventricular) artery marginal artery posterior descending artery (arteries) Aortic Arch Branches Brachiocephalic a R. Subclavian a. (same branches as l. subclavian a.) R. common carotic a. (same branches as l. common carotid a.) L. subclavian a. Internal thoracic a. (mammary) Vertebral a. basilar a. circle of Willis Axillary a. brachial a. radial/ulnar a’s sup./deep palmar Arches L. common carotid a. Internal carotid a. (through carotid foramen) to Circle of Willis External carotid a. superficial temporal and facial a’s Descending Thoracic Aorta Branches Parietal branches paired intercostals a’s and superior phrenic a’s Visceral branches Esophageal a’s, mediastinal a’s, pericardial a’s, bronchial a’s, etc. Descending Abdominal Aorta Parietal branches Inferior phrenic a’s Paired lumbar a’s Visceral branches Celiac a Hepatic a Gastric a’s Splenic a superior mesenteric a r/l suprarenal a’s r/l renal a’s r/l gonadal a’s (testicular or ovarian) inferior mesenteric a Terminal branches Middle sacral r/l common iliac a’s r/l internal a’s (hypogastric) r/l external iliac a’s r/l femoral a’s (deep femoral branch) popliteal a anterior tibial a dorsalis pedis a posterior tibial a plantar arches. peroneal a Systemic Circulation—Veins **In addition to the pulmonary circuit, there are four principal veins of the systemic circuit: the coronary sinus, the superior vena cava, the inferior vena cava and the hepatic portal vein From the Heart Cardiac veinscoronary sinus r. atrium (70%) Veins of Thesbius and sinusoids through heart wall From the Head, Neck and Shoulder Diploic veins (from cranial bones) Emissary veins (from scalp) To venous Sinuses Veins of brain (sup /inf sagittal sinus straight sinus cavernous sinus (from orbits) basilar sinuses (from ears) l/r transverse sinuses l/r sigmoid sinuses) Venous sinuses Int. Jugular v l/r Ext jugular v. l/r subclavian v l/r int jugular l/r superficial temporal l/r facial l/r ext jugular l/r subclavian l/r brachiocephalic (innominate) superior vena cava From Each Arm Deep: sup/deep palmer arches radial/ulnar vbrachial v.--> axillary v subclavian v. Superficial: venous arches/network of handcephalic/basilica v. median basilica v. (median cubital v). axillary subclavian brachial axillary From Thorax Hemiazygos & accessory hemiazygos v. (lft of vert col. brachiocephalic And azygos v Azygos v. (L-2 to Sup. VenaCava—left of vertebral column) *** Azygos veins receive parietal and visceral branches of thoracic veins, such as the intercostals veins, esophageal veins, etc. The azygos system of veins has anastomoses with the asc. lumbar veins, the inf. vena cava, the common iliac veins and the renal veins. Thus, they represent an intermediate blood channel between the sup. vena cava and inf vena cava. Gastric veins of the portal system anastomose with the azygos system. Thus portal hypertension (as in cirrhosis) may cause esophageal varices, etc. ***the inferior vena cava begins with the common iliac veins at L-4, follows the aorta up and through the diaphragm, to the rt. atrium of the heart. From Abdominopelvic Area The inferior vena cava receives blood from: Inferior phrenic veins Hepatic veins Rt. suprarenal v. (lft usually empties to renal v.) Renal veins Rt. gonadal vein (lft. usually empties to renal v.) Lumbar v’s (few pair) Terminal branches Middle sacral v. Common iliac v’s External iliac v’s ( from abdominal wall and lower extremities) internal iliac v’s (from pelvic viscera, buttocks, upper thigh, genitals and inf/middle rectal veins) From Legs Deep veins Plantar venous arch, posterior tibial v, peroneal v popliteal v Dorsal venous arch, anterior tibial v. popliteal v. femoral v. ext. iliac v. Superficial veins Dorsal and plantar venous arches and networks Greater saphenous vein femoral v. & Lesser saphenous vein deep femoral &/or popliteal v femoral v. Portal circulation Gastric v’s Inf mesenteric v (from last part of lge intestine) splenic v. Sup. mesenteric (from sm intestine and first part of lge intestine) Cystic v. All the above go to the hepatic portal vein LIVER –hepatic v. Inf vena cava ***The lower rectum blood drains to the int. iliac v’s not the portal system---hence drugs administered by suppository by-pass the portal system.