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Urinary System
basic structures and functions of the urinary system
26
Anatomy
Undergraduate 1
04/20/2012

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Term
kidneys
Definition
maintains electrolyte, acid-base, and fluid balances of the blood
the major homeostatic organ of the body
blood filter and then as a blood processor
allows toxins, metabolic wastes, and excess ions to leave the body in the urine
Term
ureters
Definition
two, drain urine from the kidneys and conduct it by peristalsis to the bladder for temporary storage
Term
urinary bladder
Definition
receives urine via the ureters and discharges it via the urethra, stores it temporarily
Term
urethra
Definition
drains the bladder
Term
renal artery
Definition
delivers 1/4 of the body's blood supply
Term
renal vein
Definition
drain the kidneys of blood
Term
renal capsule
Definition
tough fibrous layer surrounding the kidney and covered in a thick layer of adipose tissue
Term
renal pelvis
Definition
funnel urine flowing into the ureter
Term
renal hilum
Definition
recessed central fissure, transmits the vessels, nerves, ureter
Term
cortex of kidney
Definition
outer portion of the kidney between the renal capsule and the renal medulla, contains the renal corpuscles, renal tubules, blood vessels, part where filtration occurs
Term
medulla of kidney
Definition
innermost part of the kidney, split into renal pyramids, contains the nephrons, responsible for maintaining the salt and water balance of the blood
Term
papillary region of kidney
Definition
loc. where the medullary pyramids empty urine into the minor calyx, transitional epithelium
Term
renal pyramids
Definition
cone-shaped tissues of the kidney
Term
renal columns
Definition
is a medullary extension of the renal cortex in between the renal pyramids, anchors the cortex, consists of lines of blood vessels and urinary tubes and fibrous material
Term
major calyces
Definition
surrounds the apex of the renal pyramids, passes through here before passing through the renal pelvis into the ureter
Term
minor calyces
Definition
surrounds the apex of the renal pyramids, passes through a papilla at the apex into the major calyx
Term
glomerulus
Definition
a tubular structure of capillaries that filters blood to form urine
Term
glomerular capsule
Definition
a sac at the beginning of the tubular component of a nephron in the mammalian kidney that performs the first step in the filtration of blood to form urine
Term
renal tubule
Definition
portion of the nephron containing the tubular fluid filtered through the glomerulus, continues to collecting duct system
Term
collecting duct
Definition
series of tubules and ducts that connect the nephrons to the ureter and participates in electrolyte and fluid balance through reabsorption and excretion, processes regulated by aldosterone, antidiuretic hormone
Term
loop of henle
Definition
portion of the kidney that leads from the proximal convoluted tubule/distal convoluted tubule
Term
type of epithelium for: glomerular capsule
Definition
simple squamous ep.
Term
type of epithelium for: proximal tubule
Definition
simple cuboidal ep.
Term
type of epithelium for: distal tubule
Definition
simple cuboidal ep.
Term
type of epithelium:  ureter
Definition
transitional ep.
Term
type of epithelium: urinary bladder
Definition
transitional ep.
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