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Internal Organs of Human Body

Human body is like machine. It is uniquely designed, as it consists of various biological systems,that are regulated by internal organs. Read more, to get detailed information on internal organs of

human body.

Human body can be divided into head, trunk, hands, and legs. Head and the trunk plays a majorrole in protecting some crucial internal organs. They consist of many tissues, cells and

connective tissues, that help in regulating various biological systems.

Some of the major organ systems are skeletal system, circulatory system, nervous system,

digestive system, immune system, respiratory system, urinary system, reproductive system,

lymphatic system, and endocrine system, etc., which are overlapping and interdependent.

List of Internal Organs of Human Body

Brain:The human brain is protected by the skull and it is enclosed in the cranium keeping it very safe,

since it is the center of the nervous system. The structure of the human brain can be compared

with other mammals, but it is three times bigger and more advanced than other mammals. It

houses our cherished memories, future plans, and keeps us alert in the present. The brain helpsthe body to activate muscles and it secretes chemicals that allow to respond to the external

stimuli. No other animals have the ability to 'think' and weigh things logically. But, the human

brain performs some executive functions, such as, self control, planning, reasoning, and abstractthinking, that makes human beings the most intelligent species on entire earth.

The brain is one of the largest and most complex organs in the human body. It is made up ofmore than 100 billion nerves that communicate in trillions of connections called synapses.

The brain is made up of many specialized areas that work together:

The cortex is the outermost layer of brain cells. Thinking and voluntary movements begin in the

cortex.The brain stem is between the spinal cord and the rest of the brain. Basic functions like

breathing and sleep are controlled here.

The basal ganglia are a cluster of structures in the center of the brain. The basal gangliacoordinate messages between multiple other brain areas.

The cerebellum is at the base and the back of the brain. The cerebellum is responsible for

coordination and balance.

The brain is also divided into several lobes:

The frontal lobes are responsible for problem solving and judgment and motor function.

The parietal lobes manage sensation, handwriting, and body position.

The temporal lobes are involved with memory and hearing. The occipital lobes contain the brain's visual processing system.

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The brain is surrounded by a layer of tissue called the meninges. The skull (cranium) helps

protect the brain from injury.

Heart:Primary function of the heart is to provide de-oxygenated blood to all the body organs through

blood vessels by rhythmic contractions, also known as heart beats. The heart is made of

involuntary cardiac muscles, and this is the reason why the heart continues beating even when

we are asleep. The heart weighs 250 to 350 grams and is almost the size of the fist. It is locatedin the left side of the thorax and is protected by the rib cage. The pericardium, a double-walled

sac, that encloses heart, not only protects the heart but anchors it's surrounding structure and

prevents heart from overfilling with blood.

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Lungs:

Human body consists of two lungs and they lead the respiratory system functions. Lungs workvery closely with the heart. Lungs provide the pure atmospheric oxygen to the blood that's in turn

circulated by the heart to various body organs. The lungs also remove carbon dioxide and other

impurities from the blood veins. The heart is nearly flanked by lungs, so it also acts as a softshock absorbent for the heart and also maintains the pH level of the blood.

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Stomach:It is the key player in the digestive system. Stomach is a pear shaped organ located in the

abdominal cavity between esophagus and intestines. The stomach can change it's size and shape,

depending on the position of the body and the amount of food inside, since it is muscular andelastic in nature. Stomach is the large and multi chambered organ, that hosts special bacteria

which produce enzymes necessary for digestion. It secrets gastric acid, hydrochloric acid and

maintains the pH level, that helps in smooth digestion of edible foods.

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Liver:It is located on the right side of the abdominal cavity. Some of the important functions of the

liver include, filtering harmful substances from the blood, maintaining cholesterol and glucoselevel in blood, secreting certain amino acids, storing vitamins and minerals, secreting chemicals

that break down the fats, and converting glucose to glycogen, etc.

Apart from these there are various internal organs, such as kidneys, bladder, pancreas, thymus,

eyes, pituitary gland, hypothalamus, spleen, appendix, adrenals, etc., including differentreproductive organs in men and women.

Study of internal organs of human body, which is a part of human anatomy, is essential to any

health discipline. Dysfunction of the internal organs can be fatal, and hence it is important to

understand their functions. This will help you understand your body well to keep it fit and

healthy.

The liver is a large, meaty organ that sits on the right side of the belly. Weighing about 3 pounds,

the liver is reddish-brown in color and feels rubbery to the touch. Normally you can't feel the

liver, because it's protected by the rib cage.

The liver has two large sections, called the right and the left lobes. The gallbladder sits under theliver, along with parts of the pancreas and intestines. The liver and these organs work together to

digest, absorb, and process food.

The liver's main job is to filter the blood coming from the digestive tract, before passing it to the

rest of the body. The liver also detoxifies chemicals and metabolizes drugs. As it does so, the

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liver secretes bile that ends up back in the intestines. The liver also makes proteins important for

blood clotting and other functions.