|Statement||Edited by Tibor J. Greenwalt and G. A. Jamieson.|
|Contributions||Greenwalt, Tibor J. 1914-, Jamieson, Graham A.|
|The Physical Object|
|Pagination||311 p. :|
|Number of Pages||311|
Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (K), or click on a page image below to browse page by by: red cell destruction. Once the process starts, it progresses rapidly, eventuating in a serious decrease in red blood cells within a few hours and, often, death. c- Erythroblastosis Fetalis In Erythroblastosis fetalis Rh-positive red blood cells in the fetus are attacked by antibodies from an Rh-negative Size: KB. White Blood Cells (Leukocytes) White blood cells are nucleated cells that are a very important part of the body protective mechanism. This type of cell that constitutes less then 1% of the blood volume attacks harmful microorganisms such as viruses and bacteria. Once arrived at the “scene”, most white blood cells destroy invading microbe by File Size: KB. Myeloid (blood producing) tissue is found in the red bone marrow located in the spongy bone. As a person ages much of this marrow becomes fatty and ceases production. But it retains stem cells and can be called on to regenerate and produce blood cells later in an emergency. RBCs enter the blood at a rate of about 2 million cells per second.
In the human embryo, the first site of blood formation is the yolk in embryonic life, the liver becomes the most important red blood cell-forming organ, but it is soon succeeded by the bone marrow, which in adult life is the only source of both red blood cells and the granulocytes. Both the red and white blood cells arise through a series of complex, gradual, and successive. Blood - Blood - Production of red blood cells (erythropoiesis): Red cells are produced continuously in the marrow of certain bones. As stated above, in adults the principal sites of red cell production, called erythropoiesis, are the marrow spaces of the vertebrae, ribs, breastbone, and pelvis. Within the bone marrow the red cell is derived from a primitive precursor, or erythroblast, a. Fred's blood was determined to be AB positive. What does this mean? A) Antibodies to A and B are present in the red cells. B) His blood lacks Rh factor. C) There are no antibodies to A, to B, or to Rh antigens in the plasma. D) He can only receive blood from a donor who is AB positive. the site of red blood cell destruction where RBCS are permanently destroyed in the blood stream. - formation of hemoglobin-haptoglobin (Hb-Hp) complex which is then removed by the liver - circulation of free Hb in plasma and then filtered by the kidneys - followed by reabsorption into the plasma again.
The rate of blood cell production is controlled by the body's needs. Normal blood cells last for a limited time (ranging from a few hours to a few days for white blood cells, to about 10 days for platelets, to about days for red blood cells) and must be replaced constantly. Certain conditions may trigger additional production of blood cells. However, most of blood supply comes from the mother through the placenta. As development progresses, blood formation occurs primarily in the spleen, liver, and lymph nodes. When bone marrow develops, it eventually assumes the task of forming most of the blood cells for the entire organism. Erythropoiesis, the process of making erythrocytes, begins with the formation of proerythroblasts from hemopoietic stem cells. Over three to five days, several stages of development follow as ribosomes proliferate and hemoglobin is synthesized. Finally, the nucleus is ejected, producing the depression in the center of the cell. Blood contains liquid plasma and blood cells are formed in the bone blood cells arise from the same bone marrow stem cells. The immortal,undifferentiated,pluripotent stem cellsgive rise to Erythrocytes(RBCs),Leukocytes(WBCs), and Platelets. 7. ERYTHROCYTES(RBC) Also known as red blood cells.