Download Unirnary intro - Liberty Union High School District

Urinary System
 Kidneys: removes wastes and regulates
blood volume and composition
 Ureters: tubes that connect the kidneys to
the bladder
 Bladder: A thin muscled sac with rugae that
stores urine until it can be voided
 Urethra: a tube that carries urine from the
bladder to the exterior of the body
Wastes
 Nitrogenous wastes: 50% is urea which is a
product of protein catabolism that produces
ammonia that the liver then changes into
urea
 Uric acid and creatinine are also NW not as
dangerous
 Blood urea nitrogen (BUN): elevated levels
of BUN can cause uremia which leads to
comas and death
Excretion
 The process of separating wastes from body
fluids and eliminating them
 What four systems play a roll in excretion
–A
–B
–C
–D