Is blood created in bone marrow?
205937
Blood is created in the bone marrow, or rather the red blood cells are created by hematopoetic stem cells.  however, there are MANY different kinds of cells in your blood, and getting them "matured" happens in many different places throughout your body, including the spleen, lymph system, etc.
189639
good question.  Yes mature RBC do not have mucleus and their functions are all based on the proteins, hemoglobins and other molecules in the cells that already put into function before they leave the bone marrow.  In another words, all functions of a mature RBC have been programed and functioning well before they leave the bone marrow.  In that case, you don't need a nucleus because no more transcription and translation are needed.\n\nHowever, the pre-cursor of RBC can be found within the bone marrow and they all have nucleus.  \n\nThere are disease state that you can actually find nucleated RBC in the blood stream, for example, when the body have severe anemia, the body is in-need of mass production of RBC, the bone marrow does not even have time to remove the nucleus before the cell was release from the bone marrow.
648838
The skeletal system supports the whole body, including the bones. In addition to holding things up, and being propelled by the muscular system, Bones create blood in the marrow.
253734
in a way, i think this doc is right...blood without red blood cells, which is the majority of the formed elements in the blood contents, is plasma. what makes up blood plasma is water, electrolytes (salt), plasma protein. what makes up tears is water, salt, enzyme (a form of protein). so i think Dr. Karl makes sense in this way....but, besides RBCs, there are WBCs, and platelets in blood...so he had said...tears are blood without formed elements, he could have been more precise...
509181
The baby makes its own blood. It comes neither from the father or the mother. While it is in the womb, its own blood circulates through the cord and receives nutrients from the mother but the baby's blood and the mother's are separate and never normally mix. \n\nSince the baby receives genes from both the mother and the father, the type of blood is influenced by that.
178862
Bones are made of a mix of hard stuff that gives them strength and tons of living cells which help them grow and repair themselves. Like other cells in your body, the bone cells rely on blood to keep them alive. Blood brings them food and oxygen and takes away waste. \nIf bones weren't made of living cells, things like broken toes or arms would never mend. But don't worry, they do. That's because your bone cells are busy growing and multiplying to repair the break! How? When you break your toe, blood clots form to close up the space between the broken segments. Then your body mobilizes bone cells to deposit more of the hard stuff to bridge the break. \nSkin is alive. It's made of many thin sheets of layers of flat, stacked cells in which you'll find nerves, blood vessels, hair follicles, glands, and sensory receptors. \nOlder cells are constantly being pushed to the surface by new cells which grow from below. When the old ones reach the top, they become wider and flatter as they get rubbed and worn by all your activity. And, sooner or later, they end up popping off like tiles blown from a roof in a strong wind. In fact, every minute 30,000-40,000 dead skin cells fall from your body! In approximately a month's time, your body has made a whole new layer of skin cells!\nAs an adult, you may have more than 20 square feet of skin -- about the size of a blanket. \nYou are likely to shed some 40 pounds of skin in a lifetime. \nRight now there are over a million dust mites, microscopic critters invisible to the naked eye, on your mattress and pillow, chomping on the dead skin cells that fell off you last night!
358897
There is bone marrow in the center of the bone.  Dogs love to eat that.
290653
Hematopoiesis occurs in the liver during fetal development, then shifts the the bone marrow-All mammals have this pattern.
407797
OK, an assumption has to be made here. As long as there is no moving charge in the coagulating blood then there is no magnetic field produced and hence the magnitude in Tesla's will be zero.\nFrom Physics it is established that a magnetic field is only produced from a moving charge or a permanent magnetic dipole neither of which should be in the blood, Loosely speaking the iron in the blood could under the influence of a strong magnetic field have become aligned but it seems very unlikely that it would maintain the dipole alignment very long and certainly  not long enough to be considered in this context.
52284
Bone marrow is the tissue that produces the very immune system cells that attack transplanted organs. Since bone marrow is a transplant, it will not attack itself, since it recognizes its own cells. Therefore, bone marrow is not rejected. Sometimes, however, the immune system cells that transplanted bone marrow produces may not recognize host tissues (since they "look" foreign to them) and may start attacking them. In a sense, the transplant "rejects" the host. This phenomenon is called graft-versus-host disease.
252132
The color comes mainly from bilirubin, a pigment that arises from the breakdown of red blood cells in the liver and bone marrow. The actual metabolic pathway of bilirubin and its byproducts in the body is very complicated, so we will simply say that a lot of it ends up in the intestine, where it is further modified by bacterial action. But the color itself comes from iron. Iron in hemoglobin in red blood cells gives blood its red color, and iron in the waste product bilirubin gives rise to its brown color.
152161
There are certain identifiable characteristics that can be found in some blood samples. The most prominent example is Sickle Cell anemia.  \nThat's just from blood. However, from DNA markers, it is possible to identify certain genomes that would give you a pre-disposition to certain races.  It may not be a definative race, but it could narrow down possibilities until you can come up with a high probability.
189501
Its actually a collection of blood disorders which used to be called "preleukemia"-following is from Wikipedia\n\n\nIn 1974 and 1975 a group of pathologists from France, the United States, and Britain met and deliberated and derived the first widely used classification of these diseases. This French-American-British (FAB) classification was published in 1976 and revised in 1982. Cases were classified into 5 categories: (ICD-O codes are provided where available)\n\n(M9980/3) Refractory anemia (RA) - characterized by less than 5% primitive blood cells (myeloblasts) in the bone marrow and pathological abnormalities primarily seen in red cell precursors; \n(M9982/3) Refractory anemia with ringed sideroblasts (RARS) - also characterized by less than 5% myeloblasts in the bone marrow, but distinguished by the presence of 15% or greater red cell precursors in the marrow being abnormal iron-stuffed cells called "ringed sideroblasts"; \n(M9983/3) Refractory anemia with excess blasts (RAEB) - characterized by 5-19% myeloblasts in the marrow; \n(M9984/3) Refractory anemia with excess blasts in transformation (RAEB-T) - characterized by 20-29% myeloblasts in the marrow (30% blasts is defined as acute myeloid leukemia); \n(M9945/3) Chronic myelomonocytic leukaemia (CMML) - not to be confused with chronic myelogenous leukemia or CML - characterized by less than 20% myeloblasts in the bone marrow and greater than 1000 * 109/uL monocytes (a type of white blood cell) circulating in the peripheral blood.
242100
platelets are just fragments of the large bone marrow cells known as megakaryocytes... \n\nand the red blood cells, or erythrocytes, have no nucleus... \n\nso he should obtain any of the white blood cells, or leukocytes, such as neutrophils granulocytes, eosinophil granulocytes, basophil granulocytes, lymphocytes, monocytes or macrophages... because it is a complete cell with an intact nucleus, where the dna is located...
231767
First off ignore those claiming that the blood in your veins is blue. The blood  everywhere in your body is red, always. All the time. It is never blue. Any blue colour is an illusion it is just an illusion.. Blood fresh from the lungs in bright red, blood in the veins is dark red. But blood is never any colour but red unless you have been poisoned and are about to die.\n\nThe blood that you can see in the veins under your skin appears to be blue because the skin and the vein itself absorbs red and yellow light preferentially. That means that only the blue light returns to your eye. But it is entirely an illusion, and the blood in the veins is a dark red colour.\n\nAnyway, the reason that the blood is red is because it contains red blood cells, and red blood cells in turn are packed with a molecule called haemoglobin. Haemoglobin is a red colour, and that is what makes blood red.
108936
well its actually true thet women tend to have blood less than men of same height weight staure and race. thi is because of one simple reason. that is male hormone testosterone. it stimulates bone marrow to produce more number of red blood cells thereby increasing the volume of blood directly. tall people or short people everyone has one set point of temperature 37 degress centigrade.
269977
chk out \nhttp://www.emc.maricopa.edu/faculty/farabee/biobk/BioBookRESPSYS.html\n4 respiration\n\n4 blood clotting\nHow does the blood clot?\nThere are two major facets of the clotting mechanism – the platelets, and the thrombin system.\nThe platelets are tiny cellular elements, made in the bone marrow, that travel in the bloodstream waiting for a bleeding problem to develop. When bleeding occurs, chemical reactions change the surface of the platelet to make it “sticky.” Sticky platelets are said to have become “activated.” These activated platelets begin adhering to the wall of the blood vessel at the site of bleeding, and within a few minutes they form what is called a “white clot.” (A clump of platelets appears white to the naked eye.)\n\nThe thrombin system consists of several blood proteins that, when bleeding occurs, become activated. The activated clotting proteins engage in a cascade of chemical reactions that finally produce a substance called fibrin. Fibrin can be thought of as a long, sticky string. Fibrin strands stick to the exposed vessel wall, clumping together and forming a web-like complex of strands. Red blood cells become caught up in the web, and a “red clot” forms.\n\nA mature blood clot consists of both platelets and fibrin strands. The strands of fibrin bind the platelets together, and “tighten” the clot to make it stable.\n\nIn arteries, the primary clotting mechanism depends on platelets. In veins, the primary clotting mechanism depends on the thrombin system. But in reality, both platelets and thrombin are involved, to one degree or another, in all blood clotting.