A capillary is hollow. It is the smallest of the blood vessels, the tubes that carry blood.
cell wall
microtubule
The description of microtubules is hollow rods or hollow cylindrical structures. They mainly help to shape and support the cell.
The white blood cell has nucleus that red blood cell does not
microtubules
microtubules
A microtubule is the structure that supports and shapes the cell.
The microtubule is the mechanism that supports the cell and gives it its shape.
The cytoskeleton is a network of hollow tubes made of proteins called microtubules that provide support and maintain the shape of the cell. They are involved in various cellular functions such as cell division, intracellular transport, and movement.
cell of blood
lumen