| A | B |
|---|
| THE HOLLOW CENTER OF A BLOOD VESSEL IS THE ___. | LUMEN |
| IN BOTH ARTERIES & VEINS, THE INNERMOST LAYER OF THE WALL IS CALLED THE TUNICA ___. | INTERNA OR INTIMA |
| IN BOTH ARTERIES & VEINS, THE MIDDLE LAYER OF THE WALL IS CALLED THE TUNICA ___. | MEDIA |
| IN BOTH ARTERIES & VEINS, THE OUTER LAYER OF THE WALL IS CALLED THE TUNICA ___, | EXTERNA OR ADVENTITIA |
| ALL BLOOD VESSELS ARE LINED WITH ___. | ENDOTHELIUM |
| IN ARTERIES, THE 3 PARTS OF THE TUNICA INTIMA ARE: | ENDOTHELIUM, BASEMENT MEMBRANE, AND INTERNAL ELASTIC LAMINA |
| THE THICKEST LAYER OF AN ARTERY WALL IS THE TUNICA ___. | MEDIA |
| ALL ARTERIES HAVE IN THEIR TUNICA MEDIA AT LEAST SOME OF THESE 2 TISSUES: | SMOOTH MUSCLE AND ELASTIC CONNECTIVE TISSUE |
| IN THE LARGEST ARTERIES (SUCH AS THE AORTA AND THE BRACHIOCEPHALIC) THE TUNICA MEDIA CONTAINS LARGE AMOUNTS OF ___. | ELASTIC CONNECTIVE TISSUE |
| IN MEDIUM SIZED ARTERIES (SUCH AS THE AXILLARY & THE FEMORAL) THE TUNICA MEDIA CONTAINS LARGE AMOUNTS OF ___. | SMOOTH MUSCLE |
| THESE BLOOD VESSELS ALWAYS CARRY BLOOD AWAY FROM THE HEART. | ARTERIES (ALSO ARTERIOLES) |
| THESE BLOOD VESSELS ALWAYS CARRY BLOOD TOWARD THE HEART. | VEINS (ALSO VENULES) |
| ALMOST ALL OF THE EXCHANGE OF SUBSTANCES INTO AND OUT OF THE BLOOD OCCURS IN THESE BLOOD VESSELS. | CAPILLARIES |
| VASOCONSTRICTION CAUSES THE LUMEN OF A BLOOD VESSEL TO BECOME ___. | SMALLER |
| VASODILATION CAUSES THE LUMEN OF A BLOOD VESSEL TO BECOME ___. | LARGER |
| CAPILLARIES THAT FORM SOLID TUBES EXCEPT FOR SMALL GAPS BETWEEN ENDOTHELIAL CELLS ARE ___ CAPILLARIES. | CONTINUOUS |
| CAPILLARIES THAT NOT ONLY HAVE GAPS BETWEEN ENDOTHELIAL CELLS BUT ALSO OPENINGS IN THE PLASMA MEMBRANES OF THEIR ENDOTHELIAL CELLS ARE ___ CAPILLARIES. | FENESTRATED |
| WIDER, TWISTING CAPILLARIES WITH VERY LARGE FENESTRATIONS, VERY LARGE INTERCELLULAR CLEFTS, AND AN INCOMPLETE BASEMENT MEMBRANE ARE CALLED ___. | SINUSOIDS |
| CAPILLARIES THAT DO NOT HAVE INTERCELLULAR CLEFTS OR FENESTRATIONS ARE FOUND IN THE ___. | BRAIN |
| IN A VEIN, THE TUNICA INTIMA CONSISTS OF: | ENDOTHELIUM AND BASEMENT MEMBRANE, NO INTERNAL ELASTIC LAMINA |
| IN A VEIN, THE TUNIC MEDIA CONSISTS OF: | VERY THIN LAYER WITH A LITTLE SMOOTH MUSCLE AND A FEW ELASTIC FIBERS |
| IN A VEIN, THE TUNICA EXTERNA CONSISTS OF: | A THICK LAYER WITH FIBROUS CONNECTIVE TISSUE |
| IF AN ARTERY AND A VEIN CARRY THE SAME AMOUNT OF BLOOD, THE ____ HAS A THINNER WALL AND A LARGER LUMEN. | VEIN |
| THE UNION OF THE BRANCHES OF 2 OR MORE ARTERIES SUPPLYING THE SAME BODY REGION IS CALLED AN ___. | ANASTOMOSIS |
