what is the purpose of bone cell ?
460607
Cells called osteocytes deposite collagen and release calcium phosphate which eventually hardens into a mineral called hydroxyapatite. This eventually forms a mineralized connetctive tissue which allows your muscles and other organs to attach themselves.
246808
there are several, one is a vacuole. It is used to store soemthing usually food within the cell
856318
The function of DNA is to allow an organism or cell to synthesize proteins and to pass that cell's/organism's characteristic to future generations of both cells (mitosis) and offspring (meiosis) \n\nIn protein synthesis, the vast DNA base pair sequence contains the blueprints for every protein produced by the body.  Through transcription of certain genes by RNA polymerase a strand of mRNA is produced.  This mRNA then exits the nucleus and enters the ribosome.  There, with the help of tRNA, the ribosome "reads" the mRNA and constructs a chain of amino acids until a complete protein is produced.  \n\nIn order to make sure future cells have the exact genetic makeup of parent cells, DNA Polymerase unzips the double helix and makes an identical copy of the entire DNA sequence.  During mitosis, these identical chromatids separate, and the cell divides into two daughter cells with identical DNA.
380634
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.
73502
could the third be osteoblasts or osteocytes (bone cells)?
365875
this is called ossification...done by osteoblast cells.
756023
You are absolutely right!  A thick band of bone DOES in fact form around a broken bone after a break, and this thickening is called a callus.\n\nAlthough they may appear dry and lifeless, bones are just as alive as the tissue that surrounds them. Inside the hard outer part of a bone is a spongy center filled with blood vessels and special cells that constantly tear down and rebuild the bone from the inside out. Bone cells called OSTEOCLASTS are like a demolition crew, breaking down old bone material.  Meanwhile cells called OSTEOBLASTS are like a construction crew, building up new bone material as the old stuff is demolished. \n\nSo how do these cells help broken bones heal? When a bone breaks, a blood clot forms around the break.  The osteoclasts near the site of the break immediately begin clearing away the "rubble" (any broken shards of bone, uneven edges, etc).  Meanwhile, the osteoblasts create the thickened bone callus to replace the blood clot and hold the broken bone together. At the same time, the osteoblasts also produce new bone material to repair the damage.   After many weeks, when the bone has regained its structural integrity and can support weight, the osteoclasts function again to "chew" the callus away.  \n\nDepending on the bone and the severity of the fracture, after several weeks its hardworking cells can repair a broken bone as good as new.
944380
Biochemistry (bones are biological) and chemistry (reaction between the molecules that make up the bone, and the vinegar and baking soda).\n\nCellular and molecular biology and microbiology don't really count, since it's you're not trying to examine how it affects individual cells.
23074
Mesenchymal cells, also known as mesenchymal stem cells or marrow stromal cells (MSC), are stem cells.
12946
Lime is calcium carbonate, which is what we use to make bone.  It is available from a wide variety of plants.\n\nCalcium doesn't just make bones, it is essential for other biological processes.  This is why you can lose bone mass - if you get low on calcium, the body will leech it from the bones for more important functions.\n\nIn chicken eggs, not only does the shell protect the embryo, the calcium is leeched from the shell to provide calcium for the growing chick.  By the time the chick is ready to hatch, the shell is thinned down enough for the chick to get through.
415184
Some hormones, like parathyroid hormone and calcitonin, directly act on cells that lay down and take up bone--mainly acting to regulate the calcium, but also the actual amount of bone.\n\nOthers, like testosterone, estrogen and progesterone, act less directly; all three of these, like calcitonin, tend to increase the amount of bone mass laid down.\n\nThere are some other substances involved as well: calcium and phosphate (bone is mostly a calcium hydroxy apatite crystal, which is mainly calcium and phosphate) and Vitamin D, which is involved in the body's handling of calcium.
736228
stem cell research itself isn't bad. What's bad (many agree) is where the stem cells are harvested. Stem cells are unique cells in that they have the capability to "become" almost any other type of human cell. They are used to help regenerate injured or diseased tissues in many areas of the body. Stem cells can be found in several areas, including bone marrow. Bone marrow stem cells have been used for many uses, such as helping subjects rebuild muscular proteins. The stem cells join with and become the cells they are partnered with.\n\nWhat makes many people upset is when stem cells, which are readily available from adult bone marrow (including the subject's own bone marrow), are, instead, harvested from aborted embryos. This practice has led to many arguments over sanctity of life, when life actually begins, etc. Many suggest that rather than enrage the controversy and destroy embryos, the stem cells should be taken from the vastly more available adult bone marrow in a process which is much less damaging to human life.
84887
Long bones in adults don't produce blood cells (except for the parts closest to your shoulders and your pelvis).  Their marrow is filled with fatty tissue. (My theory is that long bones aren't used for blood cell production so that our evolutionary ancestors could lose an arm or a leg without jeprodizing their abiltiy to make blood cells)\n\nIn children, however, all bone marrow is devoted to the production of blood cells until the age of 5 or 6.
212967
I know that bone marrow is responsible for creating red blood cells.\n\nHere's something more specific:\n\nsoft tissue filling the spongy interiors of animal bones. Red marrow is the principal organ that forms blood cells in mammals, including humans (see blood). In children, the bones contain only red marrow. As the skeleton matures, fat-storing yellow marrow displaces red marrow in the shafts of the long bones of the limbs. In adults red marrow remains chiefly in the ribs, the vertebrae, the pelvic bones, and the skull. Erythrocytes (red blood cells), platelets, and all but one kind of leukocyte (white blood cell) are manufactured in human red marrow. The marrow releases about 10 million to 15 million new erythrocytes every second, while an equivalent number are destroyed by the spleen.
194099
it is based on bone density
303828
Bone cells are roundish while muscle cells are long fibers.
1140719
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.