GU Anatomy & Physiology Flashcards
Function of genitourinary system
Eliminates waste through the excretion of metabolic waste from the body
Principal metabolic wastes which are excreted (3)
Water, CO2, nitrogenous wastes
Nitrogenous wastes (3)
Urea, uric acid, creatinine
Function and location of kidneys
Near posterior wall just below diaphragm; remove waste from blood and produce urine
9 parts of kidneys
Hilus; renal capsule; renal cortex; renal medulla; renal pelvis; pyramids; papilla; major calyces; minor calyces
Where the ureters connect with the kidneys
Hilus
Covering of kidney made out of connective tissue
Renal capsule
Outer portion of kidney
Renal cortex
Inner portion of kidney
Renal medulla
Cone-shaped regions of renal medulla
Pyramids
Tip of each pyramid containing several pores
Papilla
Hollow structure which urine flows into that branches into 4-8 funnel shaped cups
Renal pelvis
4-8 funnel shaped cups in kidneys
Major calyces
Smaller funnel shaped cups in kidneys that drain ducts and transport urine to major calyces
Minor calyces
Millions of microscopic units which make up kidneys that filter blood and produce urine
Nephrons
10 components of nephrons
Afferent arteriole; efferent arteriole; Bowman capsule; distal convoluted tubule; glomerulus; loop of Henle; peritubular capillaries; proximal; renal corpuscles; renal tubule
part of nephrons consisting of network of capillaries where blood is filtered
renal corpuscles
where blood flows into glomerulus
afferent arteriole
where blood is filtered
glomerulus
where blood flows out of the glomerulus, conducts blood to 2nd set of capillaries
efferent arteriole
2nd set of capillaries that surround renal tubule
peritubular capillaries
contains an opening in the bottom where filtrate can pass into renal tubule
Bowman capsule
where filtrate is passed and substances needed by body are returned to blood, waste products are passed into collecting ducts as urine
renal tubule
convoluted tubule; first part of renal tubule
proximal
connects the proximal and distal tubules
loop of Henle
urine drains into collecting ducts. Part of this tubule curves up making contact with afferent and efferent arterioles creating modified cells known as juxtoglomerular apparatus, forming structure which helps regulate BP in kidneys
distal convoluted tubule
location of nephron components except loop of Henle
renal cortex
location of loop of Henle
dips down into medulla
2 tubes approx 10 inches long connecting kidneys to urinary bladder
ureters
discharges urine out of the body
urethra
organ made up of connective and epithelial lining, holds up to 1.5 pints of urine
urinary bladder
composition of urine
96% water, 2.5% nitrogenous waste, 1.5% salt.
3 steps of urine formation
- Glomerular filtration; 2. Tubular reabsorption, 3. Tubular secretion