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BIOL 3320
Final Lab Exam Urinary System
41
Anatomy
Undergraduate 3
03/26/2013

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Term
Homeostatic Regulation
Definition
1)composition & volume of blood
2)blood pressure
3)ionic composition
4)glucose levels
5)excretes waste & foreign materials - urea
Term
Kidney
Definition
bean shaped organ located just above the waist behind the peritoneum on the posterior wall of the abdominal cavity
Term
Renal Capsule
Definition
most superior/external tissue layer of the kidney
Term
Renal Cortex
Definition
outer, superficial layer, site of urine formation
Term
Renal Medulla
Definition
deeper, inner layer, site of urine collection & nutrient & water reabsorption
Term
Renal Hilus
Definition
located near the center concavity of the kidney, site where ureter leaves & blood vessels enter
Term
Renal Pyramid
Definition
8-18 traingular masses of tissue in medulla, base faces cortex & apex points toward the Renal Hilus
Term
Renal Column
Definition
portions of the Renal Cortex that extend between the Renal Pyramids
Term
Renal Papillae
Definition
the apices of the Renal Pyramids
Term
Minor Calyx (Calyces)
Definition
small cuplike collecting structures, receive from the Renal Papillae
Term
Major Calyx (Calyces)
Definition
larger collecting structures that the Minor Calyces converge on
Term
Renal Pelvis
Definition
large cavity into which urine collects from the Major Calyces
Term
Ureter
Definition
tube that enters the kidney at the Renal Hilus & drains the Renal Pelvis, empties into the Urinary Bladder. One per kidney
Term
Urinary Bladder
Definition
hollow, distensible muscular organ situated in the pelvic cavity posterior to the pubic symphysis
Term
Trigone
Definition
site where ureteral openings from the base points of a triangle with apex being the internal urethral orifice
Term
Capacity
Definition
700-800mL --> the bladder will automatically contract when it reaches full capacity
Term
Urethra
Definition
tube leading from the bladder to outside the body to void urine, 4cm in females, of variable length in males at 15-20cm
Term
Nephron
Definition
located in the Renal Cortex, extends down into the medulla
Term
Renal Corpuscle
Definition
cortex
Term
Bowman's Capsule
Definition
double walled cup
Term
Glomerulus
Definition
capillary ball in the center of the Bowman's Capsule, site of filtration
Term
Capsular Space
Definition
space in betweeen the Bowman's Capsule & Glomerulus
Term
Renal Tubule
Definition
medullar extension, reabsorbs 99% of filtrate
Term
Proximate Convoluted Tubule
Definition
coiled tube attached to the Renal Corpuscle
Term
Descending Limb of Henle
Definition
section that dips down into medulla
Term
Loop of Henle
Definition
U-shaped bottom
Term
Ascending Limb of Henle
Definition
section that ascends back up to the cortex
Term
Distal Convoluted Tubule
Definition
coiled tube attached to Ascending Limb of Henle, opens into Collecting Ducts
Term
Collecting Duct
Definition
common site for multiple nephrons to connect, runs through the Renal Pyramids
Term
Right & Left Renal Arteries
Definition
carry blood to the kidneys
Term
Segmental Arteries
Definition
enter the kidney
Term
Interlobar Arteries
Definition
branches of the Segmental Arteries, travel up the Renal Columns
Term
Arcuate Arteries
Definition
arteries at the base of the Renal Pyramid
Term
Interlobular Arteries
Definition
divisions of the Arcuate, travel to the Glomerulus
Term
Afferent Arteries
Definition
enter the Glomerulus
Term
Efferent Arteriole
Definition
carry blood out of the Glomerulus
Term
Vasa Recta
Definition
capillary network that surround the nephron in the medulla, site of most absorption
Term
Interlobular Vein
Definition
reuniting of the Vasa Recta
Term
Arcuate Vein
Definition
run the base of the Renal Pyramid
Term
Interlobar Vein
Definition
travel down the Renal Columns
Term
Right & Left Renal Vein
Definition
carry blood away from the kidneys
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