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The liver is a large, reddish-brown, spongy organ in the abdomen that performs many important bodily functions, including blood filtering and the synthesis of proteins and biochemicals. It is also considered a gland because it makes chemicals the body needs. The liver is the largest internal organ and the largest gland in the human body. It is located in the right upper quadrant of the abdomen, below the diaphragm and mostly shielded by the lower right rib cage. The liver is not a muscle.
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What You'll Learn
The liver is an organ
The liver is a major metabolic organ found exclusively in vertebrate animals. It is located in the upper right quadrant of the abdomen, below the diaphragm, and on top of the stomach, right kidney, gallbladder, and intestines. The liver is the largest visceral structure in the abdominal cavity and the largest gland in the human body. It is also the heaviest internal organ, weighing about 1.5 kilograms (3.3 pounds) in humans, with a width of about 15 centimetres (6 inches).
The liver performs many essential biological functions, including the synthesis of various proteins and biochemicals necessary for digestion and growth. It is responsible for detoxification, filtering blood, and removing toxins such as harmful substances and red blood cells from the body. The liver also plays a crucial role in the digestive system by producing bile, a fluid that aids in the breakdown of dietary fat. This bile is stored in the gallbladder and excreted to the duodenum to facilitate digestion.
The liver is made up of highly specialized tissue, consisting mostly of hepatocytes, which regulate various biochemical reactions. These include the synthesis and breakdown of small and complex organic molecules vital for normal bodily functions. The liver is also involved in carbohydrate metabolism, hormone production, and the conversion and storage of nutrients such as glucose and glycogen.
The liver has a unique ability to regenerate parts that have been removed or damaged. However, in cases of complete liver failure, liver transplantation is currently the only available treatment option.
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The liver is a gland
The liver is a large, reddish-brown, spongy, wedge-shaped organ in the abdomen that performs many important bodily functions, including blood filtering. It is also considered a gland because it makes chemicals, proteins, and hormones that the body needs. The liver is the largest gland in the human body and the largest internal organ, weighing about three pounds in an adult. It is located in the upper right quadrant of the abdominal cavity, below the diaphragm, and on top of the stomach, right kidney, and intestines.
The liver is divided into two main lobes, which are made up of eight segments that consist of 1,000 lobules (small lobes). These lobules are held together by a fine, dense, irregular, fibroelastic connective tissue layer extending from the fibrous capsule covering the entire liver, known as Glisson's capsule. The liver holds about one pint (13%) of the body's blood supply at any given moment.
The liver performs hundreds of functions necessary to sustain life, including the synthesis and breakdown of small and complex organic molecules, many of which are necessary for normal vital functions. It is also responsible for detoxification, the production of bile, and the conversion and storage of nutrients such as glucose and glycogen.
The liver is a vital organ, and its health is crucial to overall well-being. Certain diseases and lifestyles can damage the liver, but there are many ways to protect it. It is important to maintain a healthy lifestyle and avoid toxins, practice good personal hygiene, and seek medical advice if any symptoms of liver problems, such as jaundice or abdominal pain, occur.
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The liver's location
The liver is located in the upper right quadrant of the abdomen, below the diaphragm, and on top of the stomach, right kidney, and intestines. It is positioned beneath the rib cage, to the right of the stomach, and overlying the gallbladder. The gallbladder, a small pouch that stores and concentrates bile, sits just under the right lobe of the liver.
The liver is connected to two large blood vessels: the hepatic artery and the portal vein. The hepatic artery carries oxygen-rich blood from the aorta via the celiac trunk, while the portal vein delivers blood rich in digested nutrients from the gastrointestinal tract, as well as the spleen and pancreas.
The liver is divided into lobes, with a division between the right and left lobes created by the falciform ligament. When viewed from below, two additional lobes, the caudate and quadrate lobes, are seen between the right and left lobes. These lobes contain thousands of lobules, which are the basic metabolic units of the liver. Each lobule is made up of millions of hepatocytes, the metabolic cells responsible for various biochemical reactions.
The liver is the body's largest solid organ, weighing approximately 1.5 kilograms (3.3 pounds) in an adult, with a width of about 15 centimetres (6 inches). Its size can vary based on individual factors such as height and weight.
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The liver's shape and weight
The liver is the largest internal organ in the human body, weighing about 3 pounds (1.36 kg) in adults. At birth, the liver weighs around 120 grams, or 4 ounces, and accounts for about 4% of body weight. The standard reference range for men is 970–1,860 grams (2.14–4.10 lb), while for women it is 600–1,770 grams (1.32–3.90 lb).
The liver is located in the upper right quadrant of the abdomen, below the diaphragm, and on top of the stomach, right kidney, and intestines. It is mostly shielded by the lower right rib cage. The liver is connected to two large blood vessels: the hepatic artery and the portal vein.
The liver is a dark reddish-brown, spongy, wedge-shaped organ with two lobes of unequal size and shape. The right lobe is larger than the left lobe. The lobes contain many blood vessels and thousands of lobules (small lobes). These lobules are connected to small ducts (tubes) that connect with larger ducts to form the common hepatic duct. The common hepatic duct transports the bile made by the liver cells to the gallbladder and duodenum (the first part of the small intestine) via the common bile duct.
The liver's size and shape can vary based on height, weight, and surrounding organs. In some species, such as snakes, the liver takes on a simple cigar-like form due to the shape of the body.
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The liver's functions
The liver is a critical organ in the human body, performing hundreds of functions that are vital to sustaining life. It is the largest internal organ and the largest gland in the human body, weighing about 3 pounds in an adult. The liver is located in the upper right quadrant of the abdomen, below the diaphragm, and on top of the stomach, right kidney, and intestines. It is connected to two large blood vessels: the hepatic artery and the portal vein.
One of the liver's essential functions is detoxification, which involves cleaning toxins and harmful substances out of the blood. It also plays a role in the breakdown and removal of old red blood cells, which is important in preventing jaundice, a condition where the skin and whites of the eyes turn yellow due to high levels of bilirubin in the blood.
The liver is also involved in the production of bile, a fluid that aids in the digestion and breakdown of dietary fat. The gallbladder stores and concentrates the bile produced by the liver before it is excreted into the duodenum to assist in digestion. Additionally, the liver is responsible for the metabolism of proteins, carbohydrates, and fats, as well as the storage of glycogen, an energy source for the body.
Furthermore, the liver regulates chemical levels in the blood and helps in the processing of hemoglobin for its iron content. It also converts poisonous ammonia to urea, which is then excreted in the urine. The liver also plays a role in thyroid hormone function and is involved in the activation and deactivation of various vitamins, such as vitamin A, D3, and E.
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Frequently asked questions
The liver is a major metabolic organ found in vertebrate animals. It is the largest internal organ and the largest gland in the human body. It is located in the upper right quadrant of the abdomen, below the diaphragm and mostly shielded by the lower right rib cage.
The liver performs many essential biological functions, including detoxification of the organism, the synthesis of various proteins and biochemicals necessary for digestion and growth, and the production of bile, a fluid that helps the body digest fat. The liver also regulates most chemical levels in the blood.
No, the liver is not a muscle. It is an organ and a gland that performs hundreds of functions vital to human life.
Certain diseases and lifestyles can damage the liver, but there are many ways to protect it. It is recommended to avoid toxins such as chemicals, smoking, and illegal drugs, practice good personal hygiene, and drink alcohol only in moderation.
