Catalyst; speeds up chemical reaction without being consumed, specially protein

Produces enzyme amylase to start starch digestion, saliva moistens food, bicarbonate maintains pH

digests proteins and fats and carbs and absorbs the water and nutrients

how the nutrients we absorb are used by the body

digestion of _____ starts in the mouth

Breaks down starches into sugars

Secretes digestive enzymes & bicarbonate into the small intestine to neutralize stomach acid

folded structures of the inner layer of the small intestine, increase the surface area of absorption

building blocks for amino acids, sugars & fat which maintain cells and tissues

helps breakdown fat so enzymes can easily digest the fat, can also move waste.

Breaks down proteins into amino acids

Produces Bile for breaking down complex fats

absorbs the last of water and nutrients, stores waste material

measurement of energy required for essential life support function such as generating heat and breathing

The muscle between the stomach and the small intestine the holds food in the stomach. It also regulates delivery to small intestine

Breaks down lipids into triglycerides and fatty acids

Stores & concentrates Bile

passageway for feces

smallest heat measurement unit and it is needed to raise temperature of 1 gram of water by 1 degree Celsius

Moistens food & creates a high pH

Breakdown big protein molecules into smaller ones

No known digestive function

expels undigested material

since 1 calorie is too tiny for human consumption we measure in kilo cals , where one calorie is equal to

Layers of the digestive system