are nails bone or dead cells??
353328
Neither.\nThey are composed largely of keratin, very closely related to the keratin found in skin.  They are made up of cells, but living ones, not dead.
236602
.... i not sure , they grow in layers though, calcium i think .?? i do know this , they are not skeletons of dead creatures... cretin
901114
there are no nerves in the actual hair or nails it is all dead. It hurts when you pull hair/ break the nail, because the nerves are at the root / nail bed.
376580
Here ya go:\n\n\nClaim: A person's fingernails and hair continue to grow after his death. \n\nStatus: False. \n\nOrigins: Creepy facts have their appeal, chief among them a morbid fascination factor. Although the true details of what happens to bodies after death is not intelligence suitable for the even mildly squeamish ("The first sign of putrefaction is a greenish skin discoloration appearing on the right lower abdomen about the second or third day after death," begins Kenneth Iserson's gruesomely detailed description in Death to Dust), we nonetheless delight in sharing what we believe are priceless tidbits of knowledge on this subject. \n\nNot surprisingly, the one factlet most often offered up as revealed truth is wholly false: Your hair and nails do not continue to grow after you die; it's all optical illusion. \n\nThe sorry fact of the matter is that we dehydrate after dying. Our flesh dries and, in so doing, pulls away from nails and hair. Thus, though the nail on our big toe, for example, remains the same length as before, the toe it is seated upon shrinks. Because we are accustomed to nails and hair growing, not hands, feet, and heads shrinking, we perceive this change as an increase in one rather than a decline in the other. \n\nTo quote the respected forensic anthropologist William R. Maples: \nIt is a myth that fingernails and hair continue to grow after death. What really happens is that the skin may retract around them, making the hair and nails prickle up and jut out more prominently. Erich Maria Remarque, in his novel All Quiet on the Western Front, imagines a dead friend's nails growing in weird, subterranean corkscrews after his burial. It is a powerful, disturbing image, but it is pure moonshine. No such thing occurs. \nTo combat this shrinkage, funeral homes slather moisturizing cream on bodies, particularly on the faces of men with heavy beards. \n\nAmong the living, fingernail growth averages about a tenth of a millimeter per day, with toenails growing about a half to a third slower. However, drugs or disease can affect these rates. The middle and fourth fingers' nails tend to grow a little faster than those of the fifth and thumb. \n\nBodies appear to do strange things after death, but all of them are attributable to the decomposition process rather than supernatural forces. At times a moldering body will make noise, but that is only the sound of gas (a natural byproduct of the putrefaction process) escaping from the human vessel that previously contained it.
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.
383434
This is a common misconception.\n\nNails, hair etc do NOT continue to grow after death - it is merely the illusion of your skin contracting around the follicles etc that makes it appear so.
191513
yep, check this website it is all a myth:\nhttp://en.wikipedia.org/wiki/Fingernail \nIt is commonly claimed that nails and hair will continue growing for several days after death. This is a myth; the appearance of growth is actually caused by the retraction of skin as the surrounding tissue dehydrates, making nails and hair more prominent
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.
316685
dead skin cells, honey
251077
fingernails? or nails for hammering??
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.
186808
The nail bed is richly vascularized to provide for the nail matrix to grow.  It is also rich in nerve cells to allow for the sense of touch.  When the nail is removed from the nail bed it opens the nerve endings to a variety of stimuli that irritate the nerves causing pain.  Good luck on your test
1077143
There are vitamins at any pharmacy. They'll say "hair, skin & nails". They have to be in your system at least a month before you notice anything, though. Also, you could try getting a "gel overlay". This is something you can get done in a nail salon. It's a really thin coating that strengthens the nail until you can get your own grown out naturally, and they don't wreck them like acrylic nails.
257239
I am not sure, but I did lost my thumb nail and it took about 5 months to fully grow back!!
133842
An osteocyte, a star-shaped cell, is the most abundant cell found in bone. Once osteoblasts become trapped in the matrix they secrete, they become osteocytes. Osteocytes are networked to each other via long processes that occupy tiny canals called canaliculi, which are used for exchange of nutrients and waste. The space that an osteocyte occupies is called a lacuna (Latin for a pit). Their main function involves maintaining the bone tissue.
792056
the bone cells mature through the different types of bone cells before becoming osteocytes.  they form their matrix while they are either osteoblasts or osteoclasts (i think osteoblasts).  when they are stuck in the matrix that they formed, they are mature osteocytes.
439829
To protect the edges of our toes. The area where the toenail is located is a place where the toe contcts objects the most. If we didn't have toenails or fingernails, the tips of our toes and fingers would be continuously bleeding and injured.