hydrostatic pressure
Yes. It is a vessel for the 100 trillion cells and the sea of "sea-like" fluid that makes your body.
Blood
Lymph
I think a vessel is containing a fluid under high pressure whereas a drum contain a fluid with no or low pressure.
As blood enters the capillary bed on the arteriole end, the blood pressure in the capillary vessel is greater than the osmotic pressure of the blood in the vessel. The net result is that fluid moves from the vessel to the body tissue.At the middle of the capillary bed, blood pressure in the vessel equals the osmotic pressure of the blood in the vessel. The net result is that fluid passes equally between the capillary vessel and the body tissue. Gasses, nutrients, and wastes are also exchanged at this point.On the venue end of the capillary bed, blood pressure in the vessel is less than the osmotic pressure of the blood in the vessel. The net result is that fluid, carbon dioxide and wastes are drawn from the body tissue into the capillary vessel.
Yes, theoretically there is more surface area inside the vessel to create friction and slow the fluid down, also there will be more fluid in the vessel at any given moment so its inertia will be greater thus increasing it's "resistance".
Pressure is created by moving particles (fluid) bumping up against surfaces. In the case of blood hydrostatic pressure, blood is about 55% plasma and that plasma doesn't just flow down the length of the blood vessel but also pushes up against the sides of it creating blood hydrostatic pressure. Now there are different kinds of capillaries but in general they are all quite leaky. When you have fluid pressure pushing up against a leaky wall, some of that fluid is going to get out.
Fluid pressure is the greatest at the deepest point. If the fluid is in different shaped vessels, the pressure is the greatest at the bottom of the vessel no matter what the shape.
A vessel is anything that contains a fluid. There are many in the body. The most numerous are the blood vessels that carry blood, but there are also lymphatic vessels that carry lymph. The spleen is an organ that is considered a vessel, and so is the cisterna chyli which holds lymphatic fluid. All of these are considered vessels.
The warmer fluid at the bottom of the vessel being heated.
lmyphedema
a possible vacum leak or transmmison is low of fluid