Lesson 11.3 Crossword


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


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

G-W Learning