What is the function of lumen in heart?
Each type of vessel has a lumen—a hollow passageway through which blood flows. Arteries have smaller lumens than veins, a characteristic that helps to maintain the pressure of blood moving through the system.
What is the lumen in cells?
The lumen of the endoplasmic reticulum (ER) is the area enclosed by the endoplasmic reticulum membrane, an extensive network of membrane tubules, vesicles and flattened cisternae (sac-like structures) found throughout the eukaryotic cell, especially those responsible for the production of hormones and other secretory
What are examples of lumen in the body?
The lumen is the opening inside a tubular body structure that is lined by body tissue known as an epithelial membrane. Examples of body structures that have a lumen include the large intestine, small intestine, veins, and arteries.