Urinary Flashcards
(22 cards)
processes that remove wastes and excess materials from the body
Excretion
excretes food wastes
Digestive system
excretes CO2, H20
Respiratory system(lungs)
excretes water, salt
Integumentary system (skin):
excretes nitrogenous wastes (e.g., urea), excess solutes, and water
Urinary system (kidneys)
To maintain homeostasis in water balance
Water intake = water output
What’s the water input
Drink, food, metabolism
Whats the water output
Urine, lungs, skin, feces
Protein metabolism produces wastes
nitrogenous
Kidney structures
cortex: outer layer of kidney,
medulla: inner region of kidney,
renal pelvis: hollow space in center of kidney where urine collects
tubes with smooth muscle that transport urine from kidneys to bladder
Ureters
has smooth muscle;
lined with epithelial cells
stores urine (600–1,000 ml)
Urinary Bladder
carries urine from bladder to outside of body
Urethra
functional units of the kidney
Nephrons
Role of nephrons
remove approximately 180 liters of fluid from the blood daily,
return most of it wastes to the blood.
nephron structure
Glomerular capsule
Renal Tubules
supplies blood to the kidney.
Renal artery
collects filtered blood from kidneys.
Renal vein
Blood vessels associated with tubules:
Arterioles
Capillaries
Glomerulus
Peritubular
moves some water and solutes from blood into tubules. (1st formation of urine)
Glomerular Filtration
Tubular reabsorption: returns a lot of fluid and useful solutes to the blood. (2nd formation of urine)
Tubular reabsorption:
adds some solutes and wastes from the blood to the tubules – for excretion. (3rd formation of urine)
Tubular secretion
