Lesson 11.3 Crossword
Across
2. | the smallest veins; connect the capillaries with the larger systemic veins |
6. | large venous channel between the left atrium and left ventricle on the posterior side of the heart that empties into the right atrium at the junction of the four chambers |
7. | the innermost layer of a blood vessel, composed of a single layer of squamous epithelial cells over a sheet of connective tissue; its smooth, frictionless surface allows blood to flow smoothly through the vessel |
8. | microscopic arteries that connect with capillaries |
9. | the artery located at the fold of the elbow where the brachial pulse is detected |
10. | a band of smooth muscle fibers that encircles the capillaries at the arteriole-capillary junctions and controls blood flow to the tissues |
11. | network of intertwined vessels formed by multiple capillaries |
12. | the thicker middle layer of a blood vessel that contains smooth muscle cells, elastic fibers, and collagen; its muscle cells are directed by the sympathetic nervous system to increase or decrease blood flow to tissues as needed |
Down
1. | the artery located on the side of the neck, where the carotid pulse is felt |
2. | vessels that carry blood to the heart |
3. | small, thin-walled vessels where oxygen and carbon dioxide gas exchange occurs |
4. | the outermost layer of a blood vessel, composed mostly of fibrous connective tissue that supports and protects the vessel |
5. | the artery located on the thumb side of the wrist, where the radial pulse is detected |
8. | vessels that carry blood away from the heart |