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Published byValentine Thompson
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How our body allows us to go through cellular respiration
We have evolved complex organ systems, many of which function to help our body go through cellular respiration
Atom Molecule Organelle Cell Tissue Organ Organ System Organism
Glucose or other fuel
The digestive system allows us to absorb nutrients such as glucose, amino acids and fats The main organs: Stomach Small Intestine Large Intestine
Breaks down food with muscles and acid Sends it on to the small intestine (no absorption)
Finishes digestion Absorbs nutrients like Glucose Amino acids Fats Minerals Vitamins These are absorbed into the bloodstream
Mostly absorbs water Also some bacteria break down food that we couldn’t The undigested material is expelled
Pancreas Secretes enzymes Secretes hormones (insulin) Liver Makes bile Digests fat Gall Bladder Stores/secretes bile
The liver stores glucose in the carbohydrate glycogen Breaks down glycogen when we need to make ATP via respiration Along with many other vital roles
Oxygen Carbon dioxide
The respiratory system facilitates gas exchange Examples of respiratory systems: Lungs Gills Skin breathing
Create an oxygen rich/CO2 poor environment Oxygen diffuses into blood CO2 diffuses out of it
The circulatory system transports glucose, oxygen, carbon dioxide etc. throughout the body Also things like lactic acid
The heart is a muscle which moves the substances Arteries carry blood Away from the heart Veins return blood to the heart Capillaries are where gas exchange happens
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