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Continuous capillary
Capillaries are the smallest blood vessels and are composed of a single layer of endothelial cells and their basal laminae. Connective tissue cells with contractile proteins, called pericytes, may surround a capillary. Tissues with high metabolic requirements like heart muscle have a large number of capillaries. Capillaries are so narrow that blood cells must pass through in single file.1000x, 1000x
![Capillaries > <p>Tissues with high metabolic requirements like heart muscle shown on the left, have a large number of capillaries. In contrast, tissues with low activity, like the connective tissue seen on the right, have fewer capillaries.</p>](https://digitalhistology.org/wp-content/uploads/2017/07/Or.CV_.V.Caps-2-1-ping.png)
Capillaries >
Tissues with high metabolic requirements like heart muscle shown on the left, have a large number of capillaries. In contrast, tissues with low activity, like the connective tissue seen on the right, have fewer capillaries.
![- Endothelial cells <p>Capillaries are the smallest blood vessels and are composed of a single layer of endothelial cells and their basal laminae. Connective tissue cells with contractile proteins, called pericytes, may surround a capillary. Tissues with high metabolic requirements like heart muscle have a large number of capillaries. Capillaries are so narrow that blood cells must pass through in single file.1000x, 1000x</p>](https://digitalhistology.org/wp-content/uploads/2017/07/Or.CV_.V.Caps-2-2-ping.png)
- Endothelial cells
Capillaries are the smallest blood vessels and are composed of a single layer of endothelial cells and their basal laminae. Connective tissue cells with contractile proteins, called pericytes, may surround a capillary. Tissues with high metabolic requirements like heart muscle have a large number of capillaries. Capillaries are so narrow that blood cells must pass through in single file.1000x, 1000x
![Arteriole <p>Capillaries are the smallest blood vessels and are composed of a single layer of endothelial cells and their basal laminae. Connective tissue cells with contractile proteins, called pericytes, may surround a capillary. Tissues with high metabolic requirements like heart muscle have a large number of capillaries. Capillaries are so narrow that blood cells must pass through in single file.1000x, 1000x</p>](https://digitalhistology.org/wp-content/uploads/2017/07/Or.CV_.V.Caps-2-3-ping.png)
Arteriole
Capillaries are the smallest blood vessels and are composed of a single layer of endothelial cells and their basal laminae. Connective tissue cells with contractile proteins, called pericytes, may surround a capillary. Tissues with high metabolic requirements like heart muscle have a large number of capillaries. Capillaries are so narrow that blood cells must pass through in single file.1000x, 1000x
![Venule <p>Capillaries are the smallest blood vessels and are composed of a single layer of endothelial cells and their basal laminae. Connective tissue cells with contractile proteins, called pericytes, may surround a capillary. Tissues with high metabolic requirements like heart muscle have a large number of capillaries. Capillaries are so narrow that blood cells must pass through in single file.1000x, 1000x</p>](https://digitalhistology.org/wp-content/uploads/2017/07/Or.CV_.V.Caps-2-4-ping.png)
Venule
Capillaries are the smallest blood vessels and are composed of a single layer of endothelial cells and their basal laminae. Connective tissue cells with contractile proteins, called pericytes, may surround a capillary. Tissues with high metabolic requirements like heart muscle have a large number of capillaries. Capillaries are so narrow that blood cells must pass through in single file.1000x, 1000x
![Nerve <p>Capillaries are the smallest blood vessels and are composed of a single layer of endothelial cells and their basal laminae. Connective tissue cells with contractile proteins, called pericytes, may surround a capillary. Tissues with high metabolic requirements like heart muscle have a large number of capillaries. Capillaries are so narrow that blood cells must pass through in single file.1000x, 1000x</p>](https://digitalhistology.org/wp-content/uploads/2017/07/Or.CV_.V.Caps-2-5-ping.png)
Nerve
Capillaries are the smallest blood vessels and are composed of a single layer of endothelial cells and their basal laminae. Connective tissue cells with contractile proteins, called pericytes, may surround a capillary. Tissues with high metabolic requirements like heart muscle have a large number of capillaries. Capillaries are so narrow that blood cells must pass through in single file.1000x, 1000x