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This blog was opened by (SOPHIAARON) to accomodate (SOPHIA)'s Science journal.Do enjoy your stay here, and don't take what's not yours! tagboard
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Biology 8
 Above is an illustrated diagram of our stomach (Human stomach). Firstly, stomach is an elastic, muscular bag with thick and well developed stomach wall. --> It churns food into liquid chyle. --> It also produces an enzyme called pepsin as well as hydrochloric acid. --> Pepsin breaks down protein to amino acids. In some cases, protein are broken down into polypeptides/peptones, further digestion will take place in the duodenum. So, what's the use of hydrochloric acid then? --> Basically, it has 2 important functions. --> Firstly, it provides a suitable medium of pH2 for pepsin to work. Which means, the optimum pH level for pepsin to work well is pH2. --> Secondly, it also kill foreign particles that is present in the stomach. Why is the stomach so acidic? --> This so as the stomach walls produces hydrochloric acid. Also, the stomach ONLY digests PROTEIN. Nothing else. However, mechanical digestion still takes place in the stomach. |
