It contains few cells and no blood vessels.
cornes
It contains few cells and no blood vessels.
There is no transplant for Crohn's disease. (The large intestine is never transplanted since you can live without it. The small intestine can be transplanted, but it does not cure Crohn's disease).
because they are losing their sight and will go blind without a transplant. Or they are already blind because of bad corneas.
If you mean, "can you live without your large intestine?" then yes, you can. One must wear a Colostomy bag to collect the waste that leaves the small intestine. The large intestine also plays a small role in reabsorbing water and ions, so one would have to make sure they are not getting dehydrated or experiencing symptoms of low ion concentrations. If you mean "with only small intestine -- no stomach, etc.", then no, you cannot.
They are amongst the hardiest of plants. i've transplanted many without incident
The gallbladder is not essential - you can live without it quite easily (like your appendix). So it is never transplanted since it is not necessary. And when having a liver transplant, the gallbladder (both the original and the transplanted) are removed. Nobody with a liver transplant has a gall-bladder.
The brain can not be transplanted at present. No way exists to make a brain connect with the nerves of another individual. Transplanted lungs can work without having nerves connected to them. Hearts can use pacemakers instead of nerves from the brain to keep them ticking. Other transplanted organs do not need as many nerve endings or can wait for new nerves to grow.-------------------------------------------------Currently we are not at a point where the surgery can be done, but perhaps due to research in related fields, within a half a century, we may have most of the required technology.The Brain and Spinal Cord would have to be transplanted intact. The central nervous system including the brain and spinal cord have mechanisms to inhibit growth with a lot of current research into this, especially to aid people with spinal cord injuries.Neurons and nerves are some of the longest cells in the body, with some individual cells running essentially the whole length of the body, or perhaps having a single synapse in the middle. If you cut the neuron's axon, then the rest of the axon is essentially dead and permanently severed from the cell body and dendrites.Peripheral nerves will regrow, and can actually grow along existing nerve fibers. However, the growth is very slow and might take months or years.One other huge hurdle that might come into play would be tissue rejection and immune response. The blood brain barrier, and perhaps bone marrow transplants might help with this, but tissue rejection often slowly kills transplanted organs. For example transplanted kidneys usually fail in 10 to 20 years. Deterioration or rejection of the brain would be particularly traumatic.
Heart, kidney, liver, small intestine, lungs, pancreas. Kidneys count as two (as they can save two lives), the liver can also be split into two (smaller half goes to a child, the larger half to an adult). Lungs usually go as a pair to one person. Corneas don't save lives since you can live without them (just not easily), stomachs' are not (usually) transplanted since you can live without them, likewise large intestines, spleens, bladders and gall bladders.
The answer is obvious. Many of the organs transplanted are organs that people cannot live without. These organs are transplanted from people who have passed on and left it their will to transplant certain organs from their body.
Perennials can be transplanted in the fall until about 6 weeks before the ground freezes to ensure their survival.
Seedlings can usually be transplanted once they have developed a sturdy stem and true leaves, which typically takes 4-6 weeks after germination. It is important to wait until the seedlings are strong enough to withstand the transplant process without wilting or becoming stressed.