Download Excretion and Metabolic Wastes

Excretion and Metabolic Wastes
No Crap About it!
What are Metabolic Wastes?
• All cells metabolize sources of
energy to keep them ticking over
in terms of making energy
molecules they can use to do
'work' with, or making structural
components for the cell.
What are Metabolic Wastes?
• This involves breaking down
larger molecules or using energy
to build them. Inevitably there
are left over pieces that are
useless and may or may not be
recyclable, hence metabolic waste.
What are Metabolic Wastes
•The cell will want to get rid
of this waste as if its allowed
to build up it will become
toxic to the cell.
Quick Question
• Brainstorm some metabolic
wastes produced in the
human body. Where do each
of these waste products come
from? (Hint: Think about
why we sweat and urinate?)
Waste Products
Waste Product
Ammonia
Origin of Waste
Excretory Organ
Product
Kidneys
Breakdown of amino acids
in the liver.
Urea
Conversion of ammonia in
the liver.
Kidneys, skin
Carbon Dioxide
Cellular Respiration
(breakdown of glucose in
the cells)
Cellular respiration
(breakdown of glucose in
the cells)
Food and water
Lungs, intestines, skin
Water
Mineral Salts
Kidneys, lungs, intestines,
skin
Kidneys, lungs