What is the exact phenptype of bone marrow progenitors which differentiate to vascular cells?
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What exactly do u mean by phenotype?  I can tell you that bone marrow stem cells are the progenitors for osteoclasts, osteoblasts, and erythrocytes.
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http://images.google.co.uk/images?q=pulmonary+vascular&btnG=Search&svnum=10&hl=en&lr=
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Progenitor cells have the choice of becoming a neuron, and in some cases what kind of neuron.  A stem cell is generally a cell which can become any other cell-it may be found in the brain, but may have the option of becoming either a neuron or a glial cell.  In other words, progenitor cells are considered already partially on the road to specialization, while stem cells have a greater degree of freedom.
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Stem cells are primal cells that retain the ability to renew themselves through cell division and can differentiate into a wide range of specialized cell types. Research in the stem cell field grew out of findings by Canadian scientists Ernest A. McCulloch and James E. Till in the 1960s.\n\nThe two categories of stem cells include embryonic stem cells and adult stem cells and possibly a third, cord-blood-derived embryonic-like stem cells (CBEs). In a blastocyst of a developing embryo, stem cells differentiate into all of the specialised embryonic tissues. In adult organisms, stem cells and progenitor cells act as a repair system for the body, replenishing specialized cells. As stem cells can be readily grown and expanded via cell culture, their use in medical therapies has been proposed.\n\nlook at http://en.wikipedia.org/wiki/Stem_cell_research#Embryonic_stem_cells
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Ummm... you may get more answers sticking this question in biology! Just an idea... \nAnyway chrondrocytes (note spelling) are cartilage cells whereas osteocytes are bone cells...\nChondrocytes secrete a matrix around them of collagen and chondroitin sulfate, which provides flexible support - it's common for vertebrates to have a cartilage skeleton at the embryo stage, but this is later replaced by bone (although there's still some cartilage left in some places).\nOsteocytes are mature bone-cells (which don't secrete matrix - bone matrix is secreted by the immature bone cells, osteoblasts) the matrix secreted by osteoblasts to form bone consists mainly of collagen, and calcium, phosphate and magnesium ions come and harden with this collagen matrix.
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The dermal papillae would be akin to the root or the progenitor to the hair.  The cells of the dermal papillae control development, differentiation and cycling of the hair follicles
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There are a number of different cell types in circulation in the blood stream. Here's a quick review:\n\nRed cells carry oxygen to the cells of the body. They are essentially bags of hemoglobin, the oxygen carrying molecule. Hemoglobin binds oxygen to iron atoms, which give the hemoglobin and thus the cells their distinctive red color. \nWhite cells (leukocytes, "clear cells") are divided into two types: \nPolymorphonuclear cells, are of three types: neutrophils, eosinophils, and basophils. \nNeutrophils fight bacterial infection. They form pus and are the chief ingredient of an abscess. See band cells. \nEosinophils are cells which are strongly related to allergy and the recognition of foreign things in the body such as parasites. \nBasophils are cells that are also part of the allergy and parasite recognition system.\nLymphocytes are the virus killers. There are two types of these: \nT-cells which remember what germs we've been exposed to and how to kill them. T-cells are the key component of the immune system that is missing in AIDS. \nB-cells that secrete the actual antibodies that attach to viruses and bacteria and identify them as things to be destroyed - rather like tagging the target with a laser so that the smart bomb will home in and blast the target. \nMonocytes are cells that are related to lymphocytes but have a killing and cleaning function. They cruise through the tissues of the body cleaning up debris and killing any bacteria they find. They are often increased in viral infections - a reassuring finding that your doctor may note on your child's blood count. See mononucleosis. \nPlatelets are the cells that plug leaks in the vascular system, the clotting cells. \n\n What are the different blood groups?   \n   The differences in human blood are due to the presence or absence of certain protein molecules called antigens and antibodies. The antigens are located on the surface of the red blood cells and the antibodies are in the blood plasma. Individuals have different types and combinations of these molecules. The blood group you belong to depends on what you have inherited from your parents.\n\nThere are more than 20 genetically determined blood group systems known today, but the AB0 and Rh systems are the most important ones used for blood transfusions. Not all blood groups are compatible with each other. Mixing incompatible blood groups leads to blood clumping or agglutination, which is dangerous for individuals.\n\nNobel Laureate Karl Landsteiner was involved in the discovery of both the AB0 and Rh blood groups.\n\n \n\n \n   \n    AB0 blood grouping system   \n    According to the AB0 blood typing system there are four different kinds of blood types: A, B, AB or 0 (null).\n\n \n   \n   Blood group A\nIf you belong to the blood group A, you have A antigens on the surface of your red blood cells and B antibodies in your blood plasma.\n\n\n\n \n   \n   Blood group B\nIf you belong to the blood group B, you have B antigens on the surface of your red blood cells and A antibodies in your blood plasma.\n\n\n\n \n   \n   Blood group AB\nIf you belong to the blood group AB, you have both A and B antigens on the surface of your red blood cells and no A or B antibodies at all in your blood plasma.\n\n\n\n \n   \n   Blood group 0\nIf you belong to the blood group 0 (null), you have neither A or B antigens on the surface of your red blood cells but you have both A and B antibodies in your blood plasma.\n\n \n\n \n   \n    Rh factor blood grouping system   \n \n \n   Many people also have a so called Rh factor on the red blood cell's surface. This is also an antigen and those who have it are called Rh+. Those who haven't are called Rh-. A person with Rh- blood does not have Rh antibodies naturally in the blood plasma (as one can have A or B antibodies, for instance). But a person with Rh- blood can develop Rh antibodies in the blood plasma if he or she receives blood from a person with Rh+ bloo
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Replicate everyday: epithelial cells (skin, mucosa), bone marrow progenitor cells, lymphocytes (some of them)\nDo not replicate: neurons, skeletal muscle cells, neutrophilic granulocytes, any terminally differentiated cell
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the bone marrow is the place in the body where the blood cells are produced ( Red, White and Platelets).\nA bone marrow biopsy tells the MD what the ratio between healthy, malignant and non-producing cells are.\nIn elderly people sometimes you see that the healthy cells are pushed to the side by non-producing cells (f.e.fat) or an overgrows of other cells like white cells ( leukemia).\nyou can also tell if there is a case of malnutrition or a lack of iron or vitamin ( B12).\nI hope it is a simple as that, but it is a very common thing in elderly people.
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5 different types:\n\nAdult stem cells\nEmbryonic stem cells\nParthenogenesis\nStem cells from cord blood or amniotic fluid\nSomatic cell nuclear transfer cloning
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That's a slightly odd question as each of those example has more than one cell type within it. Blood has red blood cells and several types of white, bones have several sorts of cells involved with them... and so forth. There are also issues like the fact red blood cells don't divide. I'm going to assume they're talking about the cells that create the blood, but that might be wrong. It's a vaguely worded question... if you got it as a homework question, you might want to get some clarification on exactly which cells are being asked about.\n\nYou can make a few generalisations. The two obvious ones for fast division are skin and blood, simply because they are both replaced regularly in the body. Bone cells aren't replaced so frequently as bones are more static, so would be have slower cell division.\n\nThe fast cell division answer for the plant cells is probably the root tip, as this does divide quickly. Plants do need to get their root system sorted out first, as otherwise they don't have a source of water/nutients to grow the rest.
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seedless and nonvascular\n\nit's in my science book!!\n\ni'm in AP Bio
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Femur is the name given to thigh bone. In human skeleton it extends from the hip joint to the knee joint. It is the longest single bone in the human skeleton.\n \nBone marrow = Many long bones, including the one above mentioned, have a cylindrical cavity at the center . This cavity is filled with very soft, butter like or pulpy matter. this matter is the bone marrow. \n\nRed blood cells are constantly formed in the bone marrow.
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Simplified explanation: The blood cells are formed from stem cells in the bone marrow. Many of the various proteins in the blood are formed in the liver. The liquid part of the blood is formed from the liquid you drink and is filtered by the kidneys.
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The process by which the formed elements of blood develop is called hemopoiesis or hematopoiesis.Before birth,hemopoisis first occurs in the yolk sac of an embryo and later in the liver ,spleen, thymus and lymph nodes of a fetus.\n\nRed bone marrow is a highly vascularized connective tissue located in the microscopic spaces between trabeculae of spongy bone tissue.About 0.05-0.1% of red bone marrow cells are derived from mesenchymal cells called pluripotent stem cells.these cells have the capacity to develop into several different types of cells.\nStem cells in red bone marrow reproduce themselves,proliferate and differentiate into cells that give rise to blood cells,marcophages,reticular cells,mast cells and adipocytes.\n\nIn order to form blood cells,pruripotent stem cels in red bone marrow produce two further types of stem cells,called myeloid stem cells and lymphoid stem cells.\nMyeloid stem cells begin their development in the red bone marrow and give rise to red blood cells ,platelets, monocytes, neutrophils,eosinophils abd basophils.\nLymphoid cells begin thier development in red bone marrow but complete it in lymphatic tissues,they give rise to the lymphocytes.\n\nHope this helps ya.Please check my spelling coz i think i misspelled some words in there.
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Stem cells are obtained from Cord Blood.  This is the umbilical cord which connects the infant to his/her mother.  The cells found in this cord are able to differentiate into different types of cells for example, stem cells can grow into a pancreas or a liver, etc. with the stimulus of certain hormones. Stem cell research explores this idea and sees better ways of improving health for example, how can we grow these cells to regenerate nerves for people suffering from spinal cord injuries. It is ongoing but also controversial.
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this is a good question. what decides a cell living or nonliving is its metabolic activity. ..now you got me thinking... \n\nBut  to clear some confusion, they don't have nucleus, and that's why they can't reproduce by themselves.\n\nK...finally got some info from a very good friend, a hematologist. Here is what he says...\n\n"The question you asked is a very very deep one indeed.  In fact, we can have a very lively debate about it.  It is a very philosophical question, in that it's equivalent to asking, "Is virus a living organism?"  If we define life, as you say, by metabolic activities, then yes, red blood cell is a living cell.  Red blood cell uses the metabolic pathway of glycosis to generate energy.  It also has a variety of proteins and enzymes responsible for signal transduction.\n \nHowever, a red blood cell is a terminally differentiated cell and more than that it lacks the genetic material, the means and the mechanism to replicate.  Given that one of the primary goal of life is to have "offsprings" either through asexual replication or sexual duplication, red blood cell lacks that ability.  However, the progenitor of red blood cell (hematopoietic stem cells) does have the ability to replicate and differentiate."