The document discusses the different cell types that make up heart tissue, including endothelial cells that line blood vessels, smooth muscle cells in blood vessel walls, vesicles that allow transport between endothelial cells, junctions between endothelial cells, white blood cells in the blood, and the lumen of blood vessels. It provides images of these key components when selected.

1. 17.12 Heart Tissue
Essential Cell Biology, Fourth Edition
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2. 17.12 Heart Tissue
Essential Cell Biology, Fourth Edition
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Show me: endothelial cell surrounding blood vessel

3. 17.12 Heart Tissue
Essential Cell Biology, Fourth Edition
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Show me: smooth muscle cell

4. 17.12 Heart Tissue
Essential Cell Biology, Fourth Edition
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Show me: budding/fusing transcytotic vesicles

5. 17.12 Heart Tissue
Essential Cell Biology, Fourth Edition
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Show me: junctions between endothelial cells

6. 17.12 Heart Tissue
Essential Cell Biology, Fourth Edition
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Show me: white blood cell

7. 17.12 Heart Tissue
Essential Cell Biology, Fourth Edition
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Show me: blood vessel (lumen)