urinary system function
removes nitrogenous wastes from the body; maintains the electrolyte, acid-base, and fluid balances of the blood. Is a major homeostatic organ of the body.
helps remove waste, maintains homeostasis, manufactures urine.
go from aorta into hilum of kidneys.
renal veins function
circulatory drainage of kidneys.
drain urine from kidneys and take it to bladder via peristalsis.
urinary bladder function
storage of urine.
drains bladder of urine.
triangular region of bladder that contains two ureteral and one urethral orifice.
collecting ducts function
receives urine from many nephrons and empty into minor calyces.
feeds capillary bed.
drains capillary bed.
peritubular capillary function
reclaims most of filtrate.
voiding the bladder.
internal and external urethral sphincter function
control the outflow of urine from the bladder.
physical characteristics of urine
color: clear and pale yellow to amber
pH: 4.5 - 8; 6 is average.
specific gravity: from 1.001 to 1.030 (weighs more than water).
a pigment metabolite that comes from the body's destruction of hemoglobin. Gives urine its color. The more concentrated the solute, the darker the color of urine.
normal constituents of urine
water, urea, sodium ions, potassium ions, phophate ions, sulfate ions, creatinine, uric acid, calcium ions, magnesium ions, bicarbonate ions.
functional unit of kidney and responsible for forming urine. Contains two major structures: glomerulus and renal tubule.