<span>An open fracture is where the bone protrudes out
of the skin. This usually occurs in accidents where collisions cause a massive
blow to the body which then causes the bone to break and be displaced from
their original positions. This type of fracture needs immediate medical
assistance because this might cause a major blood loss to the body which might
result to other complications (e.g. infections, further displacements). <span>
<span>Once an
open fracture occurs, a person is suggested to stay in his exact position and
not be moved until medical assistance arrives. Open fractures often require
major surgeries and they usually take a longer time to recover than hairline
fractures because a protrusion to the skin is evident.</span></span></span>
<span>Cytotoxic T cells recognize specfic antigens on the MHC sites to respond to an infection whereas NK cells are innate response and don't rely on antigen.</span>
