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MRI may be requested for: Detection and characterization of benign lesions Metastasis Hepatocellular carcinoma Status of chronic liver disease The main job of the liver is to filter blood from the digestive tract before passing it to the rest of the body. The liver may be responsible for up to separate functions, usually in combination with other systems and organs.
It detoxifies chemicals and metabolizes drugs, secreting bile that ends up back in the intestines while Module 2 cell processes so. The liver makes proteins that are important for blood clotting and other functions. It is involved in carbohydrate metabolism, protein metabolism synthesis and degradationand amino acid synthesis.
In lipid metabolism, the liver is involved in cholesterol synthesis, the production of triglycerides fatsand the synthesis of the bulk of lipoproteins. The liver breaks down insulin and other hormones, and converts ammonia to urea urea cycle. It also stores glucose, in the form of glycogen, as well as vitamins A, D, B12, K, iron, and copper.
With all of these functions to perform, it is easy to understand how liver disease can have such a debilitating effect on the entire body.
Anatomy The liver is the largest gland in the body, and the second largest organ in the body the skin is the largest organ. It occupies the entire upper right quadrant of the abdominal cavity. The liver is wedge-shaped when seen from the side, with a rounded upper border, and a thin, sharp inferior border.
The base of the liver is to the right, and the apex towards the left. The upper surface of the liver can typically be percussed gently tapped for diagnostic purposes at the level of the fifth intercostal space. The liver weighs approximately 3 pounds when healthy, but can be over 22 pounds when diseased, as with chronic cirrhosis.
From an anterior perspective, the liver is divided into a large right lobe and a smaller left lobe by the falciform ligament Figure The posterior or visceral surface has two additional lobes between the right and left lobes, which are the caudate lobe superiorly, and the quadrate lobe inferiorly Figure The caudate and quadrate lobes are divided by the transverse fissure, or porta hepatis.
The ligamentum venosum and ligamentum teres serve to divide the caudate and quadrate lobes from the large left lobe. The right sagittal fossa separates the right lobe of the liver from the caudate and quadrate lobes.
Anterior surface of liver. Visceral posterior surface of liver. The liver is enveloped in visceral peritoneum, which is a thin, double-layered membrane that serves to reduce friction with other organs.
The falciform ligament is the only functional ligament, attaching the anterosuperior surface of the liver to the anterior abdominal wall and the diaphragm. The free edge of the falciform contains the ligamentum teres hepatis, or round ligament, which is attached to the inferior surface of the liver.
The falciform is also continuous with the anterior layer of the coronary ligament, located on the superoposterior surface of the liver. The anterior and posterior layers of the coronary ligament unite on their ends to form the right and left triangular ligaments, respectively Figure Between the two leaves of the coronary ligament, and to the right of the inferior vena cava, is the bare area of the liver.
This area is not enclosed in visceral peritoneum, but instead lies flush against the fascia covering the diaphragm. The bare area is clinically important because it represents a site where infection can spread from the abdominal cavity to the thoracic cavity.
The posterior layer of the coronary ligament continues to the right as the hepatorenal ligament. The hepatorenal pouch is the area below the posterior layer of the coronary ligament and the right triangular ligament over the right kidney. The hepatogastric and hepatoduodenal ligaments help to connect the liver to the lesser omentum that covers the lesser curvature of the stomach and the first part of the duodenum Figure 1.
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The time-saving online video lessons in the Cell Functions and Processes unit the discuss chemical reactions and molecular functions which underlie important chemical processes such energy production and storage, cell respiration, and intercellular interactions.
A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon. It is a form of photoelectric cell, defined as a device whose electrical characteristics, such as current, voltage, or resistance, vary when exposed to light..
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The Module Directory provides information on all taught modules offered by Queen Mary during the academic year The modules are listed alphabetically, and you can search and sort the list by title, key words, academic school, module code and/or semester.
Aims. This module follows on from Module , Introduction to the Internet, and aims to provide a practical guide to using Web resources on- and offline.. This Web page is designed to be read from the printed page. Use File / Print in your browser to produce a printed benjaminpohle.com you have digested the contents of the printed copy, come back to the onscreen version to follow up the hyperlinks.
Voyage inside the cell Two types of cells that make up all living things on earth: prokaryotic and eukaryotic. Prokaryotic cells (check this video), like bacteria, have no 'nucleus', while eukaryotic cells, like those of the human body, benjaminpohle.com, a human cell is enclosed by a cell, or plasma, membrane.
Enclosed by that membrane is the cytoplasm (with associated organelles) plus a nucleus.