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Urinary.System
The Urinary System for Massage
Question | Answer |
---|---|
Hilus | concave area on the medial aspect of the kidney; where the renal artery, renal vein, and ureter come into or out of the kidney |
Renal capsule | outer layer of tissue surrounding the kidney |
Renal cortex | outer zone of the kidney |
Renal medulla | inner zone of the kidney, contains the renal pyramids |
Renal pyramids | triangular areas in the kidney that contain the nephrons;the apex of each pyramid contains many little openings (papillae) where the urine can drain out of the nephron |
Calyces (major & minor) | inlets on the renal pelvis that collect the urine from the renal pyramids |
Renal pelvis | an expansion of the ureter inside the kidney; collects the urine from the calyces and directs it down the ureters. |
Nephron | functional unit of the kidney; approximately 1 million per kidney |
Glomerulus | capillary tuft that performs the first step in filtering blood to form urine |
Glomerular (Bowman's capsule) | surrounds and encapsulates the glomerulus; receives the filtrate forced out of the glomerulus that will eventually become urine. |
Proximal convoluted tubule | 1st segment of the nephron tubule;reabsorbs about 65% of the water; reabsorbs many nutrients; secrets histamine and some drugs into urine |
Nephron loop (loop of Henle) | includes the ascending and descending limbs of this loop in the kidney. |
Descending limb | Nephron loop, permeable to water, absorbs about 15% of reabsorbed water from the filtrate |
Ascending limb | nephron loop, permeable to salts, absorbs sodium and chloride from the filtrate |
Distal convoluted tubule | last segment of the nephron before thye collecting duct |
Collecting duct | tubule that takes the filtrate from the distal convoluted tubule out the the papillae and into the minor calyces |
Ureters | long tubes that conduct urine from each kidney to the urinary bladder. |
micturition | another name for urination |
Urethra | tube that transports urine out of the bladder |
Internal urethral sphincter | involuntary smooth muscle around the neck of the bladder where urethra emerges. |
External urethral sphincter | voluntary skeletal muscle; below the internal urethral sphincter |