...The stomach secretes acid and enzymes that digest food...
The pancreas produces biological catalysts called digestive enzymes which speed up the digestive reactions.
The pancreas produces biological catalysts called digestive _______ which speed up the digestive reactions.
Different things happen to food as it passes through the digestive system:
food is digested in the mouth, stomach and small intestine
digested food is absorbed into the bloodstream in the small intestine
excess water is absorbed back into the body in the large intestine
any undigested food passes out of the anus as faeces when we go to the toilet
The glucose is a liquid substance, so it passes easier and it has smaller molecules
Starch is smaller and it passes easier
Glucose is smaller but starch passes easier
Starch is smaller but glucose passes easier
Glucose is smaller and it passes easier
Mouth: Where food enters the alimentary canal and digestion begins
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Large intestine - colon: Where water is reabsorbed
Food is broken down into smaller pieces in the mouth by chewing. This is an example of mechanical digestion. The teeth cut and crush food, and the pieces are mixed with saliva to form a ball of food called a bolus.
Food is broken down into smaller pieces in the mouth by chewing. This is an example of ____. The teeth cut and crush food, and the pieces are mixed with ____ to form a ball of food called a bolus.
The gastric chief cells of the stomach secrete enzymes for protein breakdown (inactive pepsinogen, and in infancy rennin). Hydrochloric acid activates pepsinogen into the enzyme pepsin, which then helps digestion by breaking the bonds linking amino acids, a process known as proteolysis.
The muscles work together to produce wave-like contractions. These have a ‘squeezing action’ that pushes the bolus through the gut.
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