excretion

• Excretion


  The removal of metabolic waste from the body
• Egestion


  To remove the undigested food from the body
• Excretory system


  This system consists of the lungs skin and kidneys which filter waster from the body
• Renal


  The artery and vein that transport blood to and from the kidney
• Kidney


  The organ responsible for removing urea, water and some salts from the bloodstream
• Bladder


  Stores urine
• Ureter


  The tubule that links the kidney and bladder
• Urethra


  Runs from the bladder to the outside world
• Cortex


  The darker, outer region of the kidney where the glomerulus, bowman's capsules and proximal and distal convolutes tubules are located
• Medulla


  Lighter, inner region of the kidney that is hypertonic due to the active transport of salts out of the loop of Henle
• Nephron


  The microscopic filtered g units that make up the kindeys
• Glomerulus


  A bundle of capillaries from the renal artery that generates high blood pressure by having a larger entry article than leaving arteriole
• Bowman's capsule


  A hollow cup of cells that contains the glomerulus
• proximal convoluted tubule


  The site of selective re absorption
• Loop of henle


  A nephron structure that is involved in osmoregulation but without the use of ADH
• distal convoluted tubule


  Between the loop of Henle and the collecting duct; Selective reabsorption and secretion occur here, most notably to regulate reabsorption of water and sodium
• Collecting duct


  A segment of the nephron that returns water form the filtrate to the bloodstream.
• Ultrafiltration


  The process where small molecules are forced from the blood out of the capillaries of the glomerulus, under high pressure, into the Bowman's capsule.
• Glomerular filtrate


  Substances that filter out of the blood through the thin walls of the glomeruli
• Selective reabsorbtion


  the process in the kidney where the materials needed in the body such as glucose, some mineral ions, and water are reabsorbed back into the blood from the filtrate
• Osmoregualtion


  The control of water balance.
• Antidiuretic hormone


  hormone secreted by the posterior pituitary gland which aids in water reabsorption by the kidney
• Aquaporins


  channel proteins that facilitate the passage of water