The heart is the only organ in the body that never rests throughout the entire life. The heart is a hollow muscle that pumps blood throughout the blood vessels by repeated, rhythmic contractions. It is found in all animals with a circulatory system (including all vertebrates).
Researchers at Vanderbilt University in Nashville, Tennessee, have found that while you are asleep, the only body part that remains active is the ear.
Answer and Explanation: There is no other part of the body that knows no rest beside the heart. The few moments after the heart stops beating the body dies. The condition of sudden stopping of heartbeat called cardiac arrest, and leads to death if the heart activity isn't restored within a few minutes.
Brains can work 24 hours a day with no rest.
1-3am is the time of the Liver and a time when the body should be alseep. During this time, toxins are released from the body and fresh new blood is made. If you find yourself waking during this time, you could have too much yang energy or problems with your liver or detoxification pathways.
The brain and nerve cells require a constant supply of oxygen and will die within a few minutes, once you stop breathing. The next to go will be the heart, followed by the liver, then the kidneys and pancreas, which can last for about an hour. Skin, tendons, heart valves and corneas will still be alive after a day.
5 am to 7 am: The large intestine is active. If it's out of balance, you may feel defensive or stuck in a situation. If you're frustrated about waking up before your alarm clock sounds, you may need more fiber or water in your diet so your large intestine can properly eliminate waste.
What happens when someone dies? In time, the heart stops and they stop breathing. Within a few minutes, their brain stops functioning entirely and their skin starts to cool. At this point, they have died.
Your brain stops. Other vital organs, including your kidneys and liver, stop. All your body systems powered by these organs shut down, too, so that they're no longer capable of carrying on the ongoing processes understood as, simply, living. Death itself is a process.
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.
Explanation: The growth of most structures(muscles, bones etc...) of human body stops after adolescence. But here is one special structure called cartilage that continue to grow till death.
The brain itself does not feel pain because there are no nociceptors located in brain tissue itself. This feature explains why neurosurgeons can operate on brain tissue without causing a patient discomfort, and, in some cases, can even perform surgery while the patient is awake.
The liver has a unique capacity among organs to regenerate itself after damage. A liver can regrow to a normal size even after up to 90% of it has been removed.
This usually begins in the liver, which is rich in enzymes, and in the brain, which has high water content. Eventually, though, all other tissues and organs begin to break down in this way.
An unexpected discovery made by an international team, examining the results of an EEG on an elderly patient, who died suddenly of a heart attack while the test was in progress.
They might close their eyes frequently or they might be half-open. Facial muscles may relax and the jaw can drop. Skin can become very pale. Breathing can alternate between loud rasping breaths and quiet breathing.
Primary Meridian: Liver
If you're waking up in the middle of the night after a cocktail or two, it's because your liver is working in overdrive to relieve your body of excess toxins. The liver cleanses our blood and when this process gets interrupted, it can result in low energy and feelings of angst the following day.
The hours between 1am and 3am are governed by the liver meridian. Emotionally it is associated with anger and physically associated with your shoulder. The hours between 3am and 5am are governed by the lung meridian.
The hypothalamus, a peanut-sized structure deep inside the brain, contains groups of nerve cells that act as control centers affecting sleep and arousal.
The largest solid internal organ is your liver. It weighs approximately 3–3.5 pounds or 1.36–1.59 kilograms and is about the size of a football. Your liver is located beneath your rib cage and lungs, in the upper right area of your abdomen.
The ears and nose do not have bones inside them. Their inner supports are cartilage or 'gristle', which is lighter and more flexible than bone. This is why the nose and ears can be bent.
The strongest muscle based on its weight is the masseter. With all muscles of the jaw working together it can close the teeth with a force as great as 55 pounds (25 kilograms) on the incisors or 200 pounds (90.7 kilograms) on the molars.