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 doing so.
The adrenal glands part of the endocrine system sit on top of the kidneys and release renin which affects blood pressure, and sodium and water retention.
The bean-shaped kidneys are about the size of a closed fist. They lie against the back of the abdominal wall, outside the peritoneal cavity, just above the waistline in the lumbar area. The right kidney sits slightly higher than the left one because of the position of the liver.
The kidneys are highly vascular contain a lot of blood vessels and are divided into three main regions: The kidneys are protected in front by the contents of the abdomen and behind by the muscles attached to the backbone.
They are further protected by a layer of fat. Urinary Bladder — A sac that collects and holds urine that comes from the ureters. Urethra — a narrow passageway where urine passes from the bladder to the outside of the body, called urination.
The pyramids empty into the calyx. Medullary pyramids — formed by the collecting ducts, inner part of the kidney Ureter — collects filtrate and urine from renal pelvis and takes it to the bladder for urination Renal Artery — branches off of the aorta bringing waste-filled blood into the kidney for filtering in the nephrons; the renal artery is further subdivided into several branches inside the kidney.
Some arteries nourish the kidney cells themselves. Renal Vein — removes the filtered blood from the kidneys to the inferior vena cava Kidney Function Every minute mL of blood enter the kidneys, mL leave the kidney. The kidneys have many functions.
The kidneys are the major organs that maintain homeostasis balance of the various body functions in the body and help control blood pressure. They maintain balance in electrolytes, acid-base, and fluid in the blood.
The kidneys remove nitrogenous waste from the body creatinine, urea, ammonia and keep essential substances the body needs to function as it should. The kidneys produce the hormone erythropoietin that stimulates the production of red blood cells and enzymes. A panel of blood tests, called a Kidney Function Profileis used to monitor the kidneys, detect kidney problems or make a diagnosis.
Nephron Anatomy Renal Artery — brings waste-filled blood from the aorta to the kidney for filtering in the nephron. It looks similar to a ball of tangled yarn. Proximal convoluted tubule PCT Thin descending limb of the loop of Henle Thin Ascending limb of the loop of Henle Thick Ascending limb of the loop of Henle Distal convoluted tubule Renal Vein — when filtration is complete, blood leaves the nephron to join the renal vein, which removes the filtered blood from the kidney Arterioles — blood is brought to and carried away from the glomerular capillaries by two very small blood vessels—the afferent and efferent arterioles.
The filtrate contains high levels of salts mostly sodium. As the filtrate moves further through the loop, more water is removed which further concentrates the filtrate.
Collecting Duct — collects the filtrate Individual nephrons cannot be seen by the naked eye. The nephron is the basic structural and functional unit of the kidney. Each kidney has about 1 million nephrons. The walls of the nephron are made of a single layer of epithelial cells.
Blood containing urea and metabolic waste products enters the kidney from the liver. The blood is mechanically filtered to remove fluids, wastes, electrolytes, acids and bases into the tubular system while leaving blood cells, proteins and chemicals in the bloodstream.The composition of urine in Table is the basis for simple diagnostics.
Anuria or oliguria (renal disease. Cortex – the outer region of the kidney; extensions of the cortical tissue, contains about one million blood filtering nephrons; Nephron – these are the filtration units in the kidneys; Medulla – inner region of the kidney contains renal pyramids.
The pyramids empty into the calyx. Renal pyramids are kidney tissues that are shaped like cones. Another term for renal pyramids is malpighian pyramids. Between seven and eighteen pyramids exist in the innermost part of the kidney.
Welcome to the Hitachi Medical Systems America, Inc. MRI Anatomy and Positioning Series. Over the coming months, we will be offering teaching modules to allow users of Hitachi MRI scanners to advance their positioning skills and review the anatomy that should be seen on some common MRI exams.
functional units of the kidney that carry out all filtration and modification to produce urine; consist of renal corpuscles, proximal and distal convoluted tubules, and descending and ascending loops of Henle; drain into collecting ducts. The tissue found in the renal pelvis is modified to carry out its function.
It consists of ducts that secrete and collect water which act as a funnel.