Red blood cells have no nucleus, because most of their bulk is made up of hemoglobin, a compound that carries gases, such as oxygen and carbon dioxide. In fact, about a third of a red blood cell is dedicated to hemoglobin alone, so no room remains for a nucleus or many of the structures that other cells have.Know More
Red blood cells look like flat disks that travel around the body in blood vessels. They carry oxygen to tissues and remove carbon dioxide from them. Hemoglobin plays an important role in red blood cells, because it carries the oxygen that nourishes cells and takes away carbon dioxide to prevent it from accumulating in cells.
In the mature form, red blood cells, or erythrocytes, do not have nuclei; however, they have not always been without nuclei. In their immature forms, red blood cells did have nuclei. An intermediate form of red blood cells, called a normoblast, expels its nuclei as the amount of hemoglobin accumulates in the developing blood cell. The immature red blood cell can still manufacture hemoglobin without the aid of a nucleus.
Because red blood cells do not have nuclei, they tend to live only about 120 days, which is a much shorter lifespan than that of other types of cells. Nuclei are important to cells, because they control what substances are made in the cell. Without the nuclei to replenish what is depleted in the cell, the erythrocyte will eventually die when it runs out of resources.Learn more about Blood
Mature red blood cells do not contain nuclei. However, red blood cells that are not fully formed and not fully matured do contain nuclei for a brief period of time during their development.Full Answer >
A normal red blood cell lives for about 120 days. It takes about two days for the body to manufacture each red blood cell, and about two million are turned out every second. Production of new red blood cells occurs in the bone marrow.Full Answer >
Microcytic anemia is the condition wherein red blood cells are smaller than normal, and it is primarily caused by iron deficiency anemia and thalassemia, according to Dr. Siamak T. Nabili writing for eMedicineHealth. Iron deficiency anemia occurs due to limited or inadequate iron intake.Full Answer >
When red blood cells are placed in distilled water, which is hypotonic compared to the solution contained within the cells' membranes, the distilled water will diffuse into the red blood cells and cause them to burst. Placing red blood cells in any solution which contains a lesser degree of solute than that of the solution within the cells will cause water to diffuse into them. Because distilled water contains a zero concentration of solute, it will predictably diffuse into a red blood cell in an attempt to equalize the osmotic pressure on both sides of the cell membrane.Full Answer >