it sounds like an infection, it can be from dirt, sweat etc. The best solution is to soak it in warm water or put a hot cloth over it. Try not to break it, clean it and put neosporin on it. If you put a band-aid over it and change it every day it will draw the pus out of the cyst.
Any large blood loss can cause death.
Histamine causes the dilation of the small blood vessels while constrict the large blood vessels.
Indentured Servants. :)
Because blood is produed in your bone marrow (middle of bone)
Could be low blood sugar or diabetes
Respiratory Alkalosis.
It is a bacterial infection. You should get checked out.
Bones are light because they are hollow inside and filled primarily with marrow, a spongy substance which produces new red blood cells in large bones.
Blood in mucous, or sputum, can be linked to a variety of causes. Small quantities should not be alarming. If you are seeing large quantities or frequent intervals of blood, seek medical attention immediately.
If you mean causes, then white blood cells are made in the bone marrow by hematopoietic stem cells. There are 5 types and they live around 7 days.
Citrate in blood binds to calcium ions, forming complexes that are not available for biological functions. This decreases the amount of free calcium in the blood, leading to hypocalcemia. Additionally, citrate can chelate calcium in the blood, further reducing the level of ionized calcium available for use in blood clotting and nerve function.
The inside of human bones have called "bone marrow". In adults, marrow in large bones produces new blood cells. Source: Mah Brain.