Exceretion February 24th 2014 Mr. Rafferty Biology
ACTIVATOR? AS WE CARRY OUT OUR LIFE PROCESS, WE CONSTANTLY CREATE WASTE PRODUCTS. IF THESE METABOLIC WASTES ARE NOT REMOVED FROM OUR BODIES, WE WILL DIE! USING OUR PRIOR KNOWLEDGE, WHAT ARE SOME EXAMPLES OF WASTES THAT WE REMOVE. EX/ PLANTS HAVE A WASTE PRODUCT CALLED OXYGEN DURING PHOTOSYNTHESIS.
EXCERTION EXCERTION IS THE PROCESS BY WHICH WASTES AND EXCESS SUBSTANCES ARE REMOVED FROM ORGANISMS.
MOST IMPORTANT WASTES THE MOST IMPORTANT OF OUR METABOLIC WASTES ARE CARBON DIOXIDE, WATER, AND MINERAL SALTS. EXECRATION IS NOT TO BE CONFUSED WITH EGESTION. EXECRETION IS THE REMOVAL OF METABOLIC WASTES( IT HAS TO ENTER THE CELL) EGESTION IS THE REMOVAL OF UNDIGESTED WASTES!
TRY AND REMEMBER? Which one has the Most Advanced Digestive System? Which one the Least?
Just like we saw with Digestion, the Earthworm has a similar body system just like Humans! However as we know, the Earthworm is missing some organs that may be present in a Human or Grasshopper.
Earthworms have a special organ that assists with Execretion. This is called the Nephridia. They are tube like structures that connect throughout the worm. Nephridia s come in pairs, on either side of the Earthworm s segments. They extend into the other segments, connecting the tubes.
The wastes a Earthworm produce are CO2 and Urine! Sound Familiar!! Urine is made up of water, mineral salts, ammonia and urea. Urine passes through the Nephridia tubes and is excreted out. CO2 is excreted though the skin
Grasshopper s Exceteroy System s continue to advance They excrete wastes through the Malpighian (Mal Pig Ee In) Tubes. All other wastes are formed into Uric Acid. Uric Acid passes through the rectum with feces.(poop)
Uric Acid does not dissolve much in water. It is excreted almost entirely as a solid or semi solid by birds, reptiles and insects. Since so little water leaves in the form of Uric Acid, it helps conserve water in these organisms.
DAY 2
ORGANS THAT MATTER IN HUMAN BEINGS THE ORGANS THAT ARE INVOLVED IN EXCRETION ARE THE LUNGS, KIDNEYS, LIVER AND SKIN. THE PROCESS OF EXECRATION WORKS WITH OTHER BODY SYSTEMS TO HELP MAINTAIN HOMEOSTASIS!
Activator? Look in your Notes from Tuesday What is the specialized part of an Earthworm? What does it do? What is the specialized part of the Grasshopper? What does it do?
Human Excretory System The metabolic wastes of humans include carbon dioxide, water, salts, and urea.
The Organs The Human excretory system includes the
Organ
Organ
Organ
Lungs When we exhale the Human Lungs release CO2 and water vapor.
What Happens to our lungs when we smoke???
Liver The Human Liver has many functions. In the Excretory System, the Liver helps filter our blood and remove toxins that come from the digestive system.
What about when we drink Alcohol and Eat Fast Food A lot?? The Liver Filters All of This
The Urinary System(Kidneys) Most of the Water, Salt and UREA(found in our urine) are removed through our Urinary System.
The Kidneys The human kidneys remove wastes from our blood, and regulate water and salt levels. All the blood in our bodies passes through our kidneys several times a day.
Kidneys When the water finally reaches the kidneys it is transformed into URINE. The URIis removed through the bladder NE is transported to the Urinary System and and urinated out.
What is Dialysis? Why are they on it?
What is going on here?
Perspiration(sweating) is primarily done in Excretion to regulate body temperature. As we sweat, we are taking heat energy from our cells and releasing it through out skin.
All of these process in the Excretory System are examples of maintaining HOMEOSTASIS! Homeostasis is the process in which our bodies maintain internal balance.