EXCRETORY SYSTEM
FUNCTIONS OF THE EXCRETORY SYSTEM Provides a way for wastes to be removed from the body. waters salts nitrogen wastes (urea) drugs and poisons The removal process is called…… EXCRETION
PARTS OF THE EXCRETORY SYSTEM Kidneys Nephrons Ureter Urinary Bladder Urethra “Helper Organs” Liver Skin
KIDNEY Filters wastes out of the blood Maintains homeostasis Acid-base balance Blood pressure Outer section of kidneys has little filter factories called nephrons
NEPHRON Filters the blood in the kidneys It reabsorbs what is needed and excretes the rest as urine. Capsule: cup shaped structure in the nephron
URETER Tube that connects the kidneys to the bladder Passageway for urine to go to the bladder
URINARY BLADDER Muscular sac that stores urine
URETHRA Passageway from bladder to the outside of the body to get rid of urine
“HELPER ORGANS” Liver: acts as a filter Skin: Gets rid of unneeded amino acids Can turn poisons into harmless substances Skin: contains sweat glands that get rid of excess salts, water and urea Helps to maintain proper body temperature
SKIN Dermis: inner layer Epidermis: outer layer Blood vessels Sweat glands Oil glands Hair follicles Epidermis: outer layer
EXCRETORY SYSTEM