Chapter 20: Urinary System Flashcards
homeostasis
maintaining composition, pH, & volume of body fluids
urinary system
removes metabolic wastes & substances present in excess, including foreign substances like drugs and their toxic metabolites
organs of the urinary system
- kidneys
- ureters
- urinary bladder
- urethra
renal
refers to the kidneys
location of kidneys
- lie on either side of the vertebral column high in a depression on posterior abdominal wall
- retroperitoneal, behind parietal peritoneum
- left is slightly higher than right
- surrounded by connective tissue & masses of adipose tissue
renal corpuscle
glomerulus, glomerular capsule; site of filtration
renal tubule
PCT, descending limb, loop on henle, ascending limb, DCT; sit of renal absorption & secretion
renal sinus
hollow chamber in medial depression
hilum
entrance to renal sinus
renal pelvis
funnel-shaped sac; superior end of ureter
major calyces (renal pelvis)
large tubes
minor calyces (renal pelvis)
small tubes
renal medulla
inner, composed of renal pyramids
renal cortex
outer portion of kidney
renal columns
extensions of cortex that dip into the medulla
renal capsule
fibrous capsule around kidney
nephrons
function units of kidney, each of which is a site of urine formation
pathway of blood through kidney (12)
- renal artery
- interlobular artery
- arcuate artery
- cortical radiate artery
- afferent arteriole
- glomerular capillaries
- efferent arterioles
- peritubular capillaries
- cortical radiate vein
- arcuate vein
- interlobular vein
- renal vein
which arteriole is thicker?
afferent
nephrons are…
the basic function unit of kidneys; 2 parts
2 parts of nephron
- renal capsule
- renal tubule
glomerulus
bundle of capillaries
is it normal to find proteins in urine?
no, due to their large size
