The term "hardest" can be interpreted in a few ways; the answer differs depending on whether you mean the most difficult to transplant, the longest wait time for a donor, the most physically hard (dense), or the hardest to find in the body.
Lungs are the most difficult organ to transplant because they are highly susceptible to infections in the late stages of the donor's life. They can sustain damage during the process of recovering them from the donor or collapse after surgeons begin to ventilate them after transplant.
The enamel covering of our teeth also withstands extreme acid-base fluctuations, some of which come from various populations of bacteria that grow in our mouths. Overall, enamel is by far the toughest material in our bodies, and scientists have been examining its structure and composition for decades.
How long will I have to wait to receive a transplant?
The brain is the body's most complex organ. There are around 86 billion neurons in the human brain, all of which are in use. Each neuron communicates with many other neurons to form circuits and share information.
Main task of the liver is to process the digested material coming from the intestines through the bloodstream. Its spongy structure makes it capable to store blood and it is the bloodiest organ within our body. Liver contains approximately one liter of blood any time.
About 75% of your brain is water, making hydration crucial for sharp thinking, focus, and mood, as even mild dehydration (losing 2% of body water) can impair memory, concentration, and reaction time. The remaining part of the brain is mostly fat, and this water content is essential for creating neurotransmitters and supporting brain function.
Chronic rejection has widely varied effects on different organs. At 5 years post-transplant, 80% of lung transplants, 60% of heart transplants and 50% of kidney transplants are affected, while liver transplants are only affected 10% of the time.
Organs that have been successfully transplanted include the heart, kidneys, liver, lungs, pancreas, intestine, and thymus. Some organs, like the brain, cannot be transplanted. Tissues include bones, tendons (both referred to as musculoskeletal grafts), cornea, skin, heart valves, nerves and veins.
The times organs can survive outside of the body are listed below:
The Heart: King of Organs | HeartMath Institute.
Contexts in source publication. ... a shear modulus on the order of one kilopascal [22], brain tissue is ultrasoft-softer than any other tissue in the human body.
body water balance, water in human body, 70% of the human body is water.
Cornea transplant in humans is almost never rejected.
Vital Organs like heart, liver, kidneys, intestines, lungs, and pancreas can be donated only in case of 'brain death'. However other tissues like corneas, heart valves, skin, bones etc can be donated only in case of natural death.
Lifespan: Deceased donor kidney transplants last, on average, for about 8 to 12 years. A living donor kidney transplant could last 20 to 30 years. We have some patients that have received a living donor kidney transplant and are now 30 years out.
You'll be surprised as to how much you could lose and still live. You can still have a fairly normal life without one of your lungs, a kidney, your spleen, appendix, gall bladder, adenoids, tonsils, plus some of your lymph nodes, the fibula bones from each leg and six of your ribs.
Multiorgan transplants, especially triple transplants, remain rare. U.S. medical centers, including all three Mayo Clinic campuses — Arizona, Florida and Minnesota — have performed 62 heart, liver and kidney transplants since 1989, says Bashar A.
What organs can I donate after I die?
Kidneys are very successfully transplanted between two people with no matching antigens. A person can make antibodies against another person's HLA antigens. Antibodies can result from blood transfusions, pregnancy, infections or even a viral illness.
The five most dangerous operations are listed below:
Summary: Perioperative death and death within the first-year post-donation is a rare event with an estimated incidence of 0.09%, or about 1 in 1000 living donors.
“ Some scientists claim that the brain might be active for a short time after someone dies, maybe 7 minutes or more. They're not sure what happens during that time, if it's like a dream, seeing memories, or something else. But if it is memories, then you'd definitely be part of my 7 minutes or hopefully, more.
In debunking the ten percent myth, Knowing Neurons editor Gabrielle-Ann Torre writes that using all of one's brain would not be desirable either. Such unfettered activity would almost certainly trigger an epileptic seizure.
In adult men, about 60% of their bodies are water. However, fat tissue does not have as much water as lean tissue. In adult women, fat makes up more of the body than men, so they have about 55% of their bodies made of water.