âThey were very sleek and small and had room for two in the front, and one cramped backseat for a third person in the back.â âThey were sleek, simple, perfect vehicles for attacking in large numbers and flying away without a trace.â âThis jacket can be worn with sleek pants and a stylish shirt, or a classic sweater and jeans.â
A red blood cell count is a blood test that your doctor uses to find out how many red blood cells (RBCs) you have in your blood. It is also called an erythrocyte count. The test is important because RBCs contain hemoglobin, which carries oxygen to your bodyâs tissues.
Human blood is red because it contains a large number of red blood cells, which contain hemoglobin. Hemoglobin is a red-colored, iron-containing protein that functions in oxygen transport by reversibly binding to oxygen. Oxygenated hemoglobin and blood are bright red; deoxygenated hemoglobin and blood are dark red.Human blood does not appear blue under any circumstances. In fact, vertebrate blood in general is red. An exception is skink blood, which appears green because it contains a large amount of the protein biliverdin.uman blood is red because it contains a large number of red blood cells, which contain hemoglobin. Hemoglobin is a red-colored, iron-containing protein that functions in oxygen transport by reversibly binding to oxygen. Oxygenated hemoglobin and blood are bright red; deoxygenated hemoglobin and blood are dark red.