2 Blood Vessels Arteries PulmonaryPulmonaryThey carry blood away from the heart (they are efferent vessels)veinsarteriesVeinsThey carry blood back to (toward) the heart (they are afferent vesselsCapillariesThey connect the arteries with the veins
3 The Vessel Wall Lumen Tunica interna Tunica media Tunica externa It lines the blood vessel and is exposed to blood.EndotheliumIt is simple squamous epithelium overlying. a basement membraneBasement membraneTunica mediaIt consists of smooth muscle, collagen, and elastic tissue.Tunica externaIt consists of loose connective tissue that often merges with that of neighboring blood vessels, nerves, or other organs.Vasa vasorumThey are small vessels that supply blood to at least the outer half of the larger vessels.Nerve
4 Veins have a greater capacity for blood containment than arteries. In large arteries, blood pressure averages 90 to 100 mm Hg, whereas in veins it averages about 10 mm Hg.Veins, therefore, do not require thick, pressure resistant walls.Veins have thinner and flaccid walls and contain less muscular and elastic tissue than the arteries, that is why they can expand easily.
5 Pulmonary Arteries and Veins Right pulmonary arteryLeft pulmonary arteryLeft pulmonary veinsRight pulmonary veinsPulmonary trunk
6 Arteries of the Trunk (thorax) R. commoncarotid a.L. commoncarotid a.R. subclavian a.L. subclavian a.Brachiocephalic trunkAortic archSuperior vena cavaAscendingaortaThoracic (descending)aorta (posterior to heart)Inferior vena cavaDiaphragmAortic hiatusAbdominalaortaAnterior view
7 Superficial Veins of the Head and Neck Arteries of the Head and NeckTemporal a.Vertebral v.Externaljugular v .Internal carotid a.External carotid a.Carotid sinusInternaljugular v .Thyroid glandVertebral a.Subclavian v .Axillary v.Brachiocephalic v .Commoncarotid a.Subclavian a.(c) Superficial veins of the head and neckAxillary a.BrachiocephalictrunkLateral view
8 Cerebral Arterial Circle or Circle of Willis Anterior communicating arteryR. and L. posterior communicating arteriesCerebral Arterial Circle or Circle of Willis
9 Cerebral Arterial Circle or Circle of Willis Anterior communicating a.L. Anterior cerebral a.R. Anterior cerebral a.L. Internal carotid a.R. Internal carotid a.OpticnervesL. Middle cerebral a.R. Middle cerebral a.PituitaryglandL. Posterior communicating a.R. Posterior communicating a.L. Posterior cerebral a.R. Posterior cerebral a.Basilar a.L. Vertebral a.R. Vertebral a.
10 Arteries of the Upper Limb Right subclavian arteryArteries of the Upper LimbRight axillary arteryRight brachial arteryRight radial arteryRight ulnar artery
11 Left Brachio- cephalic vein Veins of the Upper LimbLeft subclavian veinLeft Brachio- cephalic veinLeft axillary veinCephalicBrachialBasilic
17 The Hepatic Portal System The hepatic portal system all the blood draining from the abdominal digestive tract, as well as from the pancreas, gallbladder and spleenHepatic veinsGastric vv.The hepatic portal system gives the liver first claim to the nutrients before the blood is distributed to the rest of the bodyHepaticportal v.Splenic v.Superiormesenteric v.Inferiormesenteric v.It also allows the blood to be cleansed of bacteria and toxins picked up from the intestineThe Hepatic Portal System
18 Principal Arteries L. common carotid a. R. common carotid a. R. subclavian a.L. subclavian a.Brachiocephalic trunkAortic archAscendingaortaPulmonary trunkL. axillary a.L. brachial a.
19 Principal Arteries R. brachial a. Abdominal aorta a. R. common iliac a.R. internal iliac a.R. external iliac a.R. radial a.R. ulnar a.L. femoral a.
20 Principal Arteries L. femoral a. L. posterior tibial a. R. anterior tibial a.
21 Principal Veins L. internal jugular v. R. internal jugular v. R. subclavian v.L. subclavian v.L. brachiocephalic v.R. cephalic v.Inferior vena cavaR. brachial v.(cut)R. basilic v.
22 Principal Veins R. brachial v. (cut) R. cephalic v. R. basilic v. R. Median cubital v.Inferior vena cavaL. common iliac v.R. Ulnar v.L. internal iliac v.R. Radial v.L. external iliac v.
23 Principal VeinsL. femoral v.L. great saphenous v.