Arteries & Veins To Know For Practical

Parts of Intrinsic Conduction System Sinoatrial Node (SA node) - the pacemaker; where the action potential originates, starting each heartbeat As action potential moves, contraction of atria is stimulated Atrioventricular Node (AV node) - receives action potential from SA node and sends along to…

Parts of Intrinsic Conduction System Atrioventricular Bundle (Bundle of His) – branches off into right and left bundle branches, and then sends action potential along to… Purkinje Fibers – action potential received begins ventricular contraction at apex and continues contraction back up toward atria, helping to eject blood into pulmonary trunk or aortic arch

Labeling The Heart AD: (Left) Pulmonary Artery AE: Left Atrium BC: Bicuspid (Mitral) Valve BD: Aortic Semilunar Valve BE: Left Ventricle CD: Aorta

Labeling The Heart Let’s Also Label… Pulmonary Trunk Pulmonary Semilunar Valve Septum Apex

Artery Circulation Aorta: largest artery in body; exits left ventricle and is divided into three parts Ascending aorta Aortic arch Descending aorta

Artery Circulation Ascending aorta: Where aorta first comes up; right and left coronary arteries branch from here

Artery Circulation Aortic arch: arching posteriorly and to the left and has three branches Brachiocephalic artery Left common carotid Left subclavian artery

Aortic Arch Brachiocephalic Right Common Carotid: head Internal Carotid: brain External Carotid: face

Aortic Arch Brachiocephalic Right Subclavian: right upper limb Turns into axillary at armpit Turns into brachial Branches into radial and ulnar Joins back & forms deep palmar arch, superficial palmar arch, and digital arteries

Aortic Arch Left Common Carotid: head Internal Carotid: brain External Carotid: face

Aortic Arch Left Subclavian: left upper limb Branches in the same way that Right Subclavian does

Aorta Descending Aorta Thoracic Aorta: portion in thorax, above diaphragm. Abdominal Aorta: below diaphragm; ends as two common iliac arteries

Abdominal Aorta Celiac Trunk: spleen, stomach, and liver Renal: Kidneys Splits into Right & Left Common Iliac Arteries

Right & Left Common Iliac Splits into… Internal Iliac Artery: bladder, rectum, genitalia External Iliac Artery: turns into Femoral Artery: thigh Turns into Popliteal Artery: knee area Branches into Anterior & Posterior Tibial Arteries and Fibial Artery: lower leg & foot

Vein Circulation Three Major Sections emptying back into right atrium… Coronary Sinus: Great, Anterior, Small, and Middle Cardiac Veins Superior Vena Cava Inferior Vena Cava

Upper Body Superior Vena Cava: receive blood from head, neck, and upper extremities; splits into… Right and Left Brachiocephalic Internal Jugular: Brain External Jugular: Face Turns into Subclavian…

Subclavian Turns into axillary at armpit, which breaks into… Cephalic Brachial Radial Ulnar Digital Basilic Median Cubital joins it back up with Cephalic; often, a site of drawing blood Deep palmar arch, superficial palmar arch, and digital veins

Lower Body Inferior Vena Cava Hepatic Veins: liver Hepatic Portal: Takes blood from the digestive tract, spleen, pancreas to the liver Renal: Kidneys Splits into Right & Left Common Iliac Veins

Right & Left Common Iliac Internal Iliac Vein bladder, rectum, genitalia External Iliac Vein Great Saphenous: branches off, runs along femur, longest vein in body EIV turns into Femoral Vein: thigh Turns into Popliteal Vein: knee area Branches into Anterior & Posterior Tibial Veins and Fibular Vein: lower leg & foot