structure of excretory system Flashcards
renal arteries
branch of descending aorta
blood to kidneys
ureter
waste filtered by blood is urine that’s transfers from from the kidney to the bladder
urinary sphincter
valve like and permits storage of urine
what happens when enough urine is collected in the urinary sphincter
sphincter relaxes -> urine enters urethra -> gets released from body
nephrons
functional unit of kidney
afferent artioles
supplies nephrons with blood
what do afferent artioles branch from
renel artery
what do afferent artioles branch into
capillary bed -> glomerulus for filteration
where does the blood from glomerulus go to
efferent artioles -> net of capillary beds -> peritubular capillaries that wrap around kidney tubule
where does blood leave nephron through
venule that joins renal vein
glomerulus
helps filters waste products and excess water from blood
glomerulus is surrounded by what
bowman’s capsule
cortex contains
Afferent artiole, Efferent artiole, glomerulus
fluid becoming urine enters where
bowman’s capsule from blood
where does urine go after entering BC
proximal tube -> thin tubule -> loop if henle-> medulla of kidney urine -> distal tube -> collecting duct -> renal pelvis of kidney
collecting duct
collects urine from many nephrons
What moves from GL to BC
small molecules ex. water, NACL, amino acids, H+
what is too big to move from GL to BC
plasma proteins, blood cells, platelets
bowman’s capsule
catches good stuff that needs to be filtered out
efferent artiole
blood vessel that carries blood away from glomerulus
helps maintain blood flow and pressure
proximal tubule
reabsorbs important subtances to put back into bloodstream
ex. water, glucose, amino acids
distal tubule
helps regulate balance of electrolytes
peritubular capillaries
tiny blood vessels around P/D tubules
help exchange nutrients, waste products between tubules and blood
loop of henle
reabsorbe water and sodium chloride
