protein
Babies grow in the uterus, not the stomach. Otherwise they would be digested.
because if it did then your whole digestive system would have to be in your mouth
Rennin clots or curdles milk proteins by converting the soluble protein caseinogen into insoluble casein. This is necessary because soluble milk proteins would pass through the stomach to the duodenum as water and would not be digested by pepsin. Insoluble casein remains long enough in the stomach to be digested by pepsin.
The food would be digested by digestive juices for a couple of hours.
GERBILS Answer 2: Successful troll was successful. However, the above answer is incorrect. Gerbil fur and bones are indigestible, but the proteins within the gerbil would be digested first. Carbohydrates are not digested in the stomach. (From Bio 20 AP textbook)
The stomach doesn't store food, it's main responsibility is to digest proteins, this usually takes 4-6 hours. If you didn't eat protein, it would pass on through to the small intestine where most food is digested and the process of absorption begins. So theoretically, you could live without a stomach. This is the basis for stomach bypass surgeries for weight reduction.
Then that cow would get sick pretty quick because there's no way that the feed in her stomach can be properly digested.
they would drink mint leaves
Because Pepsin is the active form of a protein manufactured in the stomach.
how would the milkshake be digested
The function of rennin is to curdle milk proteins by converting the soluble protein caesinogen into the insoluble protein caesinogen. If the new born mammal is unable to produce rennin, then the soluble milk proteins would just pass through the stomach into the duodenum like water. This is bad because the milk proteins would not be able to get digested by the pepsin. However, if there is rennin, the converted insoluble milk proteins would be abe to stay in the stomach long enough for the pepsin to digest it into polypeptides.