excretory system n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Excretory System PowerPoint Presentation
Download Presentation
Excretory System

Loading in 2 Seconds...

play fullscreen
1 / 9

Excretory System - PowerPoint PPT Presentation


  • 112 Views
  • Uploaded on

Excretory System . Excretion involves the removal of wastes that pass through a membrane or wastes that are results of metabolic processes. (Undigested food that is eliminated is NOT excreted.) Kidney : excretion of nitrogenous wastes, excess water, salts, and spices

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Excretory System' - shel


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
excretory system

Excretory System

Excretion involves the removal of wastes that pass through a membrane or wastes that are results of metabolic processes. (Undigested food that is eliminated is NOT excreted.)

Kidney: excretion of nitrogenous wastes, excess water, salts, and spices

Lungs: carbon dioxide, spices, and water

Skin: water and salts

urinary system
Urinary System

Kidneys: main organs of the urinary system that regulate the excretion of water, solutes, and nitrogenous wastes.

parts of the kidney
Parts of the Kidney
  • Cortex: outermost portion (1/3)
  • Medulla: inner 2/3 of the kidney
  • Renal pelvis: funnel-shaped structure in the center of the kidney where the renal vein and renal artery meet the kidney
  • Nephrons: functional units of kidneys where urine is formed
in the nephron
In the Nephron
  • Bowman’s capsule: cup-shaped structure enclosing a bed of capillaries where filtration occurs
  • Glomerulus: capillary bed that receives blood from the renal artery
  • Renal tubule: further exchange of materials occur here in the processes of reabsorption and secretion
  • Loop of Henle: part of the renal tubule that ensures the reabsorption of water
formation and composition of urine
Formation and Composition of Urine
  • From the renal tubules of nephrons urine collects
  • Urine is composed of urea, salts, water, and other metabolic wastes
    • Nitrogenous wastes are in the form of ammonia (toxic) which the liver converts to urea. Thus, the liver contributes to both digestion and excretion.
elimination of urine
Elimination of Urine
  • Urine travels from the renal pelvis through a narrow tube called a ureter.
  • It is then stored in the urinary bladder.
  • Elimination occurs when urine is forced through the urethra