Excretory System
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What is excretion?
The removal of waste products from the body
What are metabolic reactions?
All the reactions taking place in the body
When is nitrogenous waste form?
During metabolic reactions
How do these waste products become highly toxic?
If they accumulate ankle damaging body tissues
What would an accumulation of excess water lead to?
This wrapped homeostasis and lead to all sorts of complications
Define homeostasis
Maintaining the internal environment of the body in a steady state so that the cells can function properly
Define internal environment
Tissue fluid and blood make up the internal environment of the body
Why is the liver not and excretory organ?
Many waste products formed in the liver and excreted somewhere else
List the different types of nitrogenous waste
• Urea • Uric acid • Creatinine
How is urea formed?
Excess amino acids
What happens in the process of deamination?
Amino acids are broken down into ammonia and then into your area
How is uric acid form?
Breakdown of nucleic acids
Where is creatinine found?
Skeletal muscle cells
How is creatinine formed?
Creatine phosphate
Name non-nitrogenous waste
• Toxins and drugs • Alcohol
What does toxins and drugs consist of?
Painkillers, tranquilises and nicotine
What is the effect of alcohol?
Causes permanent damage to the liver cells if a lot is drunk over a long period
What is the damage to liver cells known as?
Cirrhosis of liver
What are the excretory products are formed in the liver?
• Bile pigments • Cholesterol
When are bile pigments formed?
From breakdown of red blood cells
When is cholesterol formed?
Breakdown of bile salts
How can we maintain homeostasis?
Get rid of waste products which continually defuses into the bloodstream
Where does the process of excretion take place?
Excretory organs
Name the four excretory organs
• Kidneys • Lungs • Skin • Gut/colon