You are currently experiencing severe pain in your leg and go to your physician for a checkup. during the examination, your physician says, "the pain you are experiencing appears to be due to misshapen blood cells that are blocking the flow of oxygen to your leg." this would indicate that the most accurate diagnosis of your condition would be

This would indicate that the most accurate diagnosis of your condition would be sickle cell disease.

Sickle cell disease is a condition that affects hemoglobin; the iron containing molecule in red blood cells that transport oxygen from the lungs to the rest of the body. This condition causes the red blood cells to become misshapen or deform into an abnormal crescent shape which can easily get accumulated together and block off small blood vessels. The blocking of the blood vessels will prevent blood from flowing to where it should in the body and this can result to pain and organ damage in affected persons.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.