Ten major systems include the skeletal, muscular, nervous, endocrine, cardiovascular, lymphatic, respiratory, digestive, urinary, and the reproductive system. Body functions are the physiological or psychological functions of body systems.
The three main parts of the body are: the head, the trunk and the limbs (extremities). The head is composed of the cranial and facial parts. It contains the brain, the centre of the nervous system.
On the outside human anatomy consists of the five basic parts, the head, neck, torso, arms and legs. However, beneath the skin there are countless biological and chemical interactions that keep the human body machine ticking over.
While your heart is a vital organ, the brain (and the nervous system that attaches to the brain) make up the most critical organ system in the human body. The human nervous system is responsible for coordinating every movement and action your body makes.
The human body is a single structure but it is made up of billions of smaller structures of four major kinds: cells, tissues, organs, and systems.
Mouth. The mouth is the main point of entry into the body for the majority of our essential nutrients. We drink using our mouth, we eat using our mouth, and we even ingest most of our oxygen through our mouth.
Brains can work 24 hours a day with no rest.
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.
The skin is the body's largest organ.
Your lungs are the third largest organs in your body. Together, your lungs weigh approximately 2.2 pounds or about 1 kilogram. They're about 9.4 inches or 24 centimeters in height during normal breathing.
Altogether there are seventy-eight main organs within the human body. These organs work in coordination to give rise to several organ systems. Among these 78 organs, five organs are considered vital for survival. These include the heart, brain, kidneys, liver and lungs.
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.
If you wake up between 1 am and 3 am it means your liver was overloaded. The liver is responsible for detoxifying our bodies and processing emotions each night. You may be suffering from an unhealthy diet, excess alcohol consumption, and/or unresolved anger or high levels of stress.
Tooth enamel is the first line of defense your teeth have against plaque and cavities. It is the white, visible part of the tooth and it is also the hardest part of the human body.
The strongest part of the body is the skeleton, as bones in general are ounce for ounce stronger than steel. More specifically, the strongest bone in the human body is the femur, as it takes approximately 4,000 newtons of force to break, on average.
The brain is the best protected organ in the body. It has multiple layers of protection starting with the first layer of protection being the skull or cranium, which acts as armor shielding the brain from blows.
At any moment in time, the majority of the body's blood will be contained within the cardiovascular system. In terms of which organ has the most blood pumped into it however, the liver gets the greatest share of the body's circulating blood by comparison with all other organs.
The liver is the second heaviest organ in the body, which discharges bile. The weight of the liver is about 1.5 kg. The brain is the third heaviest organ with an approximate mass of 1.5 kg.
The thigh bone, also called the femur, is the strongest and longest bone in the body.