Question

Pylorus is situated at the junction of
(a) Oesophagus and stomach
(b) Stomach and duodenum
(c) Duodenum and ileum
(d) Ileum and rectum

Answer 1

Hint:Pylorus controls the opening and closing of the site from where the food is churned into a chime and sent to the next level of digestion, to a ‘C’ shaped structure. One of the structures has submucosal Brunner’s gland.

Complete answer:
Pylorus is a funnel-shaped terminal end located at the end of the stomach but starting of the small intestine that is the duodenum. From this, the food enters into the small intestine at the pyloric sphincter. During the time when the stomach is inactive, the pyloric sphincter is relaxed and open and when the stomach contains food, the sphincter is closed.

So, the correct answer is , ‘Stomach and duodenum.’

Additional Information:
- Duodenum is the first part of the small intestine which is the widest and most fixed part.
- The mesentery, a double layer of peritoneum, supports and attaches the jejunum and ileum to the posterior abdominal.
- The pylorus is divided into two parts: the antrum which connects the body of the stomach and pyloric canal which connects to the duodenum.
- The pylorus and duodenum are located in the right cranial abdomen.

Note:
- Pyloric stenosis is a condition where it may get thicken and cause luminal narrowing which blocks the flow of food from the stomach to the small intestine.
- The opening and closing of the sphincter are controlled by peristaltic waves produced by the stomach during the digestion process.