EXCRETION

EXCRETION HOW DO WE REMEMBER ALL THE LIFE PROCESSES? H.N.T.R.S.G.E.R.M.R WHICH ONES HAVE WE COVERED? NUTRITION & TRANSPORT & RESPIRATION WHAT’S NEXT ON THE LIST? WHY ARE WE SKIPPING TO “E”? EXCRETION

EXCRETION WHAT IS EXCRETION? DEFINTION  WHAT IS A METABOLIC WASTE? THE PROCESS BY WHICH METABOLIC WASTES ARE REMOVED WHAT IS A METABOLIC WASTE? PRODUCTS OF THE LIFE PROCESSES (CHEMICAL REACTIONS) THAT ARE NOT NEEDED BY THE ORGANISM…IF THEY BUILD UP IN CONCETRATION THEY CAN BE TOXIC!!

EXCRETION WHAT ARE EXAMPLES OF METABOLIC WASTES? IN OTHER WORDS, WHAT ARE PRODUCTS OF REACTIONS IN THE BODY THAT WE DON’T USE??

EXCRETION THE MAJOR METABOLIC WASTES ARE CARBON DIOXIDE WATER NITROGEN COMPOUNDS (EX. AMMONIA & UREA) EXCRETION IS THE PROCESS BY WHICH THESE SUBSTANCES ARE REMOVED FROM THE BODY HOW IS CARBON DIOXIDE REMOVED? RESPIRATION / GAS EXCHANGE SEE THE OVERLAP IN LIFE PROCESSES?

EXCRETION

EXCRETION BEFORE WE CONTINUE, EVERYONE MUST BE WARNED NOT TO CONFUSE EXCRETION WITH ELIMINATION!!!

EXCRETION EXCRETION IN PROTISTS DO THEY NEED AN EXCRETORY SYSTEM? HOW DO THEY GET RID OF CARBON DIOXIDE? HOW DO THEY GET RID OF WATER? HOW DO THEY GET RID OF NITROGENOUS WASTES?

EXCRETION EXCRETION IN HYDRAS? DO THEY NEED AN EXCRETORY SYSTEM?

EXCRETION EXCRETION IN EARTHWORMS? DO THEY NEED AN EXCRETORY SYSTEM? HOW DO THEY REMOVE CARBON DIOXIDE? HOW DO THEY REMOVE NITROGENOUS WASTE?

EXCRETION EXCRETION IN EARTHWORMS SPECIAL STRUCTURE CALLED A NEPHRIDIA FILTERS OUT THE NITROGENOUS WASTE FROM THE BLOOD, THEN SHIPS IT OUT IN THE FORM OF URINE TO TINY “PORES” IN THE SKIN

EXCRETION EXCRETION IN GRASSHOPPERS? DO THEY NEED AN EXCRETORY SYSTEM? HOW DO THEY REMOVE CARBON DIOXIDE? HOW DO THEY REMOVE NITROGENOUS WASTES?

EXCRETION EXCRETION IN GRASSHOPPERS MALPIGHIAN TUBULES FILTER BLOOD AND PASS URIC ACID TO THE INTESTINE TO MIX WITH FECES

EXCRETION EXCRETION IN HUMANS DO HUMANS NEED AN EXCRETORY SYSTEM? HOW DO THEY REMOVE CARBON DIOXIDE? HOW DO THEY REMOVE NITROGENOUS WASTES?

LIVER EXCRETION EXCRETION IN HUMANS WHERE DO NITROGENOUS WASTES COME FROM? LIVER DETOXIFICATION REMOVES HARMFUL SUBSTANCES FROM THE BLOOD BILE FORMATION EXCESS BILE IS REMOVED IN FECES UREA FORMATION RESULTS FROM BREAKDOWN OF AMINO ACIDS

EXCRETION EXCRETION IN HUMANS WHERE DO NITROGENOUS WASTES COME FROM? BREAKDOWN OF AMINO ACIDS

EXCRETION EXCRETION IN HUMANS WHEN AMINO ACID IS BROKEN DOWN, AMMONIA (NH3) IS FORMED…BUT THAT IS TOO POISONOUS TO BE TRANSPORTED IN THE BLOOD, SO IT IS CONVERTED, BY THE LIVER, INTO A DIFFERENT NITROGENOUS COMPOUND CALLED UREA UREA IS ABLE TO BE TRANSPORTED IN THE BLOOD, BUT MUST THEN BE FILTERED OUT TO BE EXCRETED!!

EXCRETION EXCRETION IN HUMANS THE URINARY SYSTEM

EXCRETION EXCRETION IN HUMANS THE URINARY SYSTEM IS RESPONSIBLE FOR FILTERING UREA OUT OF THE BLOOD FOR IT TO BE EXCRETED MAJOR STRUCTURES KIDNEY**  FILTER URETER  CONNECTING TUBE BLADDER  URINE STORAGE URETHRA  EXIT TUBE

EXCRETION EXCRETION IN HUMANS **HOW DO THE KIDNEYS WORK? THEY CONTAIN MANY, MANY N E P H R O N S

EXCRETION EXCRETION IN HUMANS NEPHRONS

EXCRETION EXCRETION IN HUMANS NEPHRON MAJOR STRUCTURES GLOMERULUS BALL OF CAPILLARIES BOWMAN’S CAPSULE FILTER LOOP OF HENLE REABSORPTION COLLECTING DUCT URINE COLLECTION

EXCRETION EXCRETION IN HUMANS URINARY SYSTEM REMINDER

EXCRETION EXCRETION IN HUMANS SOME UREA IS LOST IN SWEAT, ALSO

EXCRETION EXCRETION IN HUMANS THE SKIN’S SWEAT GLANDS PRODUCES SWEAT WHICH HELPS REMOVE UREA *SWEAT IS 99% H2O SWEAT ALSO HELPS REMOVE EXCESS HEAT!!

EXCRETION EXCRETION IN HUMANS EXCRETORY DISORDERS CIRRHOSIS JAUNDICE GOUT KIDNEY STONES KIDNEY FAILURE

EXCRETION WHAT’S NEXT ON OUR LIFE PROCESS LIST? RESPONSE YOU NEED TO BE ABLE TO MOVE IN ORDER TO RESPOND…WHICH MEANS YOU NEED…

SUPPORT AND LOCOMOTION NEXT!!! EXCRETION SUPPORT AND LOCOMOTION NEXT!!!