1 IghapmLre32pg261_268 5/12/04 3:09 PM Page 261 impos03 302:bjighapmL:ighapmLrevshts:layouts: NAME _____ LAB TIME/DATE _____. REVIEW SHEET. exercise Anatomy of Blood Vessels M i c r o s c o p i c S t r u c t u r e o f t h e B l o o d Ve s s e l s 32. 1. Use key choices to identify the Blood vessel tunic described. Key: a. tunica intima b. tunica media c. tunica externa a; intima 1. innermost tunic b; media 2. bulky middle tunic contains smooth muscle and elastin a; intima 3. its smooth surface decreases resistance to Blood flow a; intima 4. tunic(s) of capillaries a; intima , b; media , c; externa 5.
2 Tunic(s) of arteries and veins b; media 6. is especially thick in elastic arteries c; externa 7. most superficial tunic 2. Servicing the capillaries is the essential function of the organs of the circulatory system. Explain this statement. Exchanges of nutrients, respiratory gases, and wastes can occur only through thin capillary walls. All other Vessels serve simply to feed or drain capillary beds. 3. Cross-sectional views of an artery and of a vein are shown here. Identify each; and on the lines beneath, note the structural details that enabled you to make these identifications: artery vein ( vessel type) ( vessel type).
3 Open, circular lumen somewhat collapsed lumen (a) (a). thick media thinner media (b) (b). 4. Why are valves present in veins but not in arteries? The high Blood pressure in arteries propels the Blood through them. The Blood pressure in veins is low and often the Blood is flowing against gravity. Valves prevent backflow. 5. Name two events occurring within the body that aid in venous return: Skeletal muscle milking action and changes in thoracic cavity pressure during breathing. Review Sheet 32 261. ighapmLre32pg261_268 5/12/04 3:09 PM Page 262 impos03 302:bjighapmL:ighapmLrevshts:layouts: 6. Why are the walls of arteries proportionately thicker than those of the corresponding veins?
4 Arteries must withstand high pressure and pressure fluctuations. Veins are low-pressure Vessels . M a j o r S y s t e m i c A r t e r i e s a n d Ve i n s o f t h e B o d y 7. Use the key on the right to identify the arteries or veins described on the left. Key: a. anterior tibial d 1. the arterial system has one of these; the venous system has two b. basilic i 2. these arteries supply the myocardium c. brachial r d. brachiocephalic , z 3. two paired arteries serving the brain e. celiac trunk o 4. longest vein in the lower limb f. cephalic k 5. artery on the dorsum of the foot checked after leg surgery g.
5 Common carotid j 6. serves the posterior thigh h. common iliac t 7. supplies the diaphragm i. coronary c 8. formed by the union of the radial and ulnar veins j. deep femoral b , f 9. two superficial veins of the arm k. dorsalis pedis w 10. artery serving the kidney l. external carotid p 11. veins draining the liver m. femoral q 12. artery that supplies the distal half of the large intestine n. fibular s 13. drains the pelvic organs o. greater saphenous m p. hepatic 14. what the external iliac artery becomes on entry into the thigh q. inferior mesenteric c 15. major artery serving the arm r. internal carotid y 16.
6 Supplies most of the small intestine s. internal iliac h 17. join to form the inferior vena cava t. phrenic e 18. an arterial trunk that has three major branches, which run to the liver, spleen, and stomach u. posterior tibial l 19. major artery serving the tissues external to the skull v. radial a w. renal , n , u 20. three veins serving the leg x. subclavian v 21. artery generally used to take the pulse at the wrist y. superior mesenteric z. vertebral 262 Review Sheet 32. ighapmLre32pg261_268 5/12/04 3:09 PM Page 263 impos03 302:bjighapmL:ighapmLrevshts:layouts: 8. The human arterial and venous systems are diagrammed on the next two pages.
7 Identify all indicated Blood Vessels . Superficial temporal artery Internal carotid artery External carotid artery Facial artery Common carotid arteries Vertebral artery Subclavian artery Brachiocephalic trunk Aortic arch Axillary artery Descending thoracic aorta Anterior humeral Coronary artery circumflex artery Ascending aorta Brachial artery Celiac trunk Common hepatic artery Splenic artery Abdominal aorta Superior mesenteric artery Renal artery Descending abdominal Gonadal artery aorta Inferior mesenteric artery Radial artery Common iliac artery Ulnar artery External iliac artery Internal iliac artery Deep palmar artery
8 Superficial palmar arch Digital arteries Deep femoral artery Lateral femoral circumflex artery Femoral artery Popliteal artery Anterior tibial artery Posterior tibial artery Fibular artery Dorsalis pedis artery Arcuate artery Metatarsal arteries Arteries Review Sheet 32 263. ighapmLre32pg261_268 5/12/04 3:09 PM Page 264 impos03 302:bjighapmL:ighapmLrevshts:layouts: Dural sinuses Superficial temporal vein Facial vein External jugular vein Vertebral vein Left subclavian vein Internal jugular vein R. brachiocephalic vein Left brachiocephalic veins Superior vena cava Axillary vein Cephalic vein Brachial vein Great cardiac vein Hepatic veins Basilic vein Splenic vein Hepatic portal vein Superior mesenteric vein Median cubital vein Inferior vena cava Renal vein Ulnar vein Inferior mesenteric vein Radial vein Common iliac vein Median antebrachial vein External iliac vein Internal iliac vein Superficial palmar venous Digital veins arch Femoral vein Great saphenous vein Popliteal vein Posterior tibial vein Anterior tibial vein Fibular vein Dorsal venous arch Metatarsal veins Veins 264 Review
9 Sheet 32. ighapmLre32pg261_268 5/12/04 3:09 PM Page 265 impos03 302:bjighapmL:ighapmLrevshts:layouts: 9. Trace the Blood flow for the following situations: a. from the capillary beds of the left thumb to the capillary beds of the right thumb Digital vein, L radial vein, L brachial vein, L axillary vein, L subclavian vein, L brachiocephalic vein, superior vena cava, R atrium, R ventricle, pulmonary trunk, pul- monary artery, lobar artery, pulmonary capillaries of the lung, pulmonary veins, L atrium, L ventricle, aortic arch, brachiocephalic artery, R subclavian artery, R axillary artery, R brachial artery, R radial artery, digital artery.
10 B. from the bicuspid valve to the tricuspid valve by way of the great toe Through bicuspid valve into left ventricle, aorta, common iliac artery, external iliac artery, femoral artery, posterior tibial artery, lateral plantar artery, digital artery, capillary beds, digital vein, plantar arch, plantar vein, posterior tibial vein, external iliac vein, common iliac vein, inferior vena cava, right atrium, then through tricuspid valve. c. from the pulmonary vein to the pulmonary artery by way of the right side of the brain Two pathways: (1) major path- way serves over 80% of cerebral tissue pulmonary vein, L atrium, L ventricle, aortic arch, brachiocephalic trunk, R common carotid artery, R internal carotid artery, R middle cerebral and right anterior cerebral arteries, capillary beds, dural sinuses, in- ternal jugular vein, brachiocephalic vein, superior vena cava, R atrium, R ventricle, pulmonary trunk, pulmonary artery.