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DOWNLOAD PDFThe medulla is the inner layer of kidney tissue, often called the renal medulla. The nephron spans both the renal cortex and medulla. The renal medulla contains the structures of the nephrons responsible for maintaining the salt and water balance of the blood.
The renal cortex is the outer layer of kidney tissue where a lot of nutrient absorption occurs.
The nephron is the functional unit of the kidney responsible for absorption and secretion of nutrients.
Bowman's capsule surrounds the glomerulus and prevents filtration of cells, platelets, and large proteins into the nephron. Those molecules remain in the blood.
The glomerulus is a cluster of capillaries derived from the afferent arterioles that bring blood to the kidney.
The proximal tubule is the site of absorption for many ions, organic molecules, vitamins and water.
The loop of Henle has ascending and descending limbs. The descending limb is more permeable to water, while the ascending limb is more permeable to salts and urea.
The distal tubule is the last major absorption area of the nephron. It absorbs roughly equal amounts of salt and water.
The collecting duct is the location where urine becomes concentrated, and is prepared to be excreted.
The ureter is outside of the nephron and connects the collecting duct and the urinary bladder. It contains smooth muscle which helps push urine to the bladder.
The urinary bladder is the storage location of urine until it is ready to be excreted. Urine makes its way to the bladder via the ureters, which bring newly made urine to the bladder.
The urethra is the last organ that urine travels to before being excreted out of the body. It is a tube that connects the urinary bladder to the urinary meatus for the removal of fluids from the body.
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