Yes.
Crater
The endoplasmic reticulum is the structure that you are looking for.
Epithelial tissue lines the outer surface of the body and lines the hollow organs.
A prism that is hollow.
Hollow
Endothelium provides a slick, friction-reducing lining in lymphatic vessels and in all hollow organs of the cardiovascular system- blood vessels and the heart. Mesothelium is the epithelium found in serous membranes, the membranes lining the ventral body cavity and covering its organs.
a valley
Hollow ice cubes are faster to make and have more surface area in your drink.
Crater
Microtubules consists of hollow tubes which provide support of the cell.
Yes. The only time that I can think of that there would be a break in an artery's endothelium is when a bit gets damaged, like with turbulent (disorganised) blood flow over an atheromatous (fatty) plaque that forms in the intima of the artery wall (there are many layers to an artery wall, the intima is one of them). Also, when a person gets a stent put in an artery to open up a narrowed bit (like when you have unstable angina) these stents can be "drug eluting" stents that stop the endothelium of the vessel from growing over the stent. Essentially, everything in the body that has a connection to the outside world (your skin, eyes, digestive tract, respiratory tract, urinary tract and reproductive tract) is lined with an epithelium. Everything inside the body that is hollow (blood vessels, lymph vessels, the heart's chambers, the ventricles in the brain) as well as the surface of most organs are lined with endothelium.
One if it is solid, two if it is hollow
One if it is solid, two if it is hollow
A hollow or depression in the earth's surface is a basin. A basin is usually shaped like a bowl, with the sides higher than the bottom. Some are filled with water, some are empty.
Surface area of a hollow cylinder = 2*pi*radius*length measured in square units.
Cilia.
total curved surface area = 2*pie*r^2