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Your stomach cells are exposed to the harsh stomach acids, if they were not replaced as rapidly as they are the stomach acid would not be able to be contained thus digesting i…tself and exposing the rest of your body to the acid. As for the red blood cells our body can only replace about 1% of them per day, essentially there are around 20-30 trillion red blood cells in your body, replacing 200-300 billion cells that are so vital is no easy task. But its easy to assume that only a fraction are replaced every day to use each cell to its fullest life before recycling it. On a side note every 7 years your a totally new you with 100% new cells.
Somewhere between 1 and 3 % are replaced every day (normally closer to 1%), You have about 25 trillion rbc So approximately 250 billion.
170,000 a day. so that's like 9 pounds of dead cells a year!
that's answer is SCIENCEPOWER TEXTBOOK 8 or Just Guess. if you have textbook it was page 53~55 Hopefully you can better ;)
Teenagers commit suicide everyday because they can't take the bullying anymore. You have no idea how bad it can get!!
an example is skin cells
about 5000000 each second and about 300 billion each minute
Around 3 million blood cells per day
There are about 2 000 000 000 of your body cells are replaced each day
It's because the repair process works from the bottom up A couple of sites agree as to why scars are permanent, but here's the clearest explanation I found: Unfortunately,… many times when our skin is wounded, the cut isn't clean, the healing conditions are not ideal and we end up with a scar. "Evolution has selected for scarring," says Dr. John Newman, a cosmetic surgeon and researcher at the Laser Center of Virginia in Virginia Beach. "Scarring is the result of a system that has learned to respond extremely quickly to a wound." When the skin is split open, the body immediately starts to pull the edges of the wound together. It does this by growing epithelial tissue over the open wound at the rate of approximately 1 millimeter every 24 hours. Fibroblasts (special collagen-producing cells found in the dermis, the second layer of skin) then rush into the wounded tissue and start laying down collagen to strengthen the skin. Normally, fibroblasts produce an organized lattice of collagen that is very strong, but when in emergency-response mode, they respond by laying down collagen in a very unorganized, haphazard way. "It is kind of like nailing down a crisscross of two-by-fours over a hole in a deck," says Newman. "It seals the hole, but it doesn't look very nice." He explains that "a scar is actually a bunch of unorganized collagen in the dermal layer of the skin." Over time, the tissue will try to reorganize, and the scar may appear to soften, but the skin may never completely return to its original state - particularly if the cut extends beyond the epidermis, the skin's outer layer. HOW REGENERATION WORKS Skin cells regenerate from the bottom up, with a turnover time of roughly one month. "You can think of the epidermis (the top layer of skin that you see) as a staircase," says Newman, "where the bottom stair is the base of the epidermis and the top stair is exposed to the air." New epidermal cells are formed by cell division at the bottom of the staircase. To make room for these new cells, the older epidermal cells are pushed upward toward the top of the staircase. The oldest cells die and fall off. The genetic material, or DNA, within any cell does not generally change, so the cells that are dividing on the bottom stairs are transmitting the same genetic characteristics from one generation of cells to the next. Unfortunately, if these characteristics are of scar tissue, that is what will be regenerated. And regardless of how much epithelial regeneration occurs above it, the scar can still show.
More than you can imagine. Over trillions
Direct from my Physio 557 professor: Erythrocyte (RBC) production 2 million/sec 230 billion/day Can Increase up to 5X that amount if necessary. Hope that answers your …question