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Urinary system chapt

urinary system chapter 18

QuestionAnswer
Urinary system consists of 2 kidneys, 2 ureters, urinary bladder and urethra
Function of kidneys Excrete waste products of cells
Kidneys regulate blood volume by excreting or conserving water
Kidneys regulate electrolytes by excreting or conserving minerals and salts
Kidneys regulate pH by excreting or conserving ions
Location of kidneys superior posterior abdominal cavity under the lower ribs on both sides of the spine
Retroperitoneal Behind the peritoneum
Kidneys are embedded in adipose tissue for protection
Right kidney slightly lower because of the liver
Demensions of the kidneys about 4 inches long, 2 inches wide and 1 inch thick
Kidneys are covered in renal fascia
Purpose of renal fascia holds kidney in place
Hilus (AKA hilum) medial indentation where the structures enter and exit the kidney
Renal cotex Outer layer, contains renal corpuscles and covoluted tubules of the nephron
Renal medulla Renal pyramids, Loops of Henle and the collecting tubules of the nephron
Papilae The end of the pyramid where the duct empties
Renal columns Extensions of the cortex into the medullathat separate the pyramids
Renal pelvis A cavity, Widened area of the ureter
Calyces Minor calyx and major calyx
Minor calyx Encloses the papillae of the renal pyramids
Major calyx 2 or 3 minor calyces join t form a major calyx
Major calyces join to make the pelvis
Renal circulation renal artery branches off of the abdominal aorta
Branches pass through the renal _______ into the cortex columns
Capillares converge and eventually become the renal valve which empties into the inferior vena cava
Innervation autonomic nerves constrict and dilate the arteries and arterioles which changes blood flow
Blood flow is directly proportional to urine formation
Autonomic nerves also stimulate the hormone renin
renin released decreases and raises decreases urine formation and increases blood pressure using the renin angiotensin mechanism
Nephron functinal unit of kidney, over 1 million in kidney, forms urine from the filtrate of blood plasma
Glomaroilous capillary network that starts and ends at arterioloes
Created by: nikr23
 

 



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