Though not the most common occurrence, Automation Engineers sometimes become Automation Engineering Managers, where the average income is $105K per year.
For example, the antrum of the stomach (gastric antrum) is a portion before the outlet, which is lined by mucosa and does not produce acid. The paranasal sinuses can be referred to as the frontal antrum, ethmoid antrum, and maxillary antrum.
It is called many piles because it contains many layers of tissue. The abomasum is the true stomach of the ruminant. It has a similar function as the stomach of a non-ruminant: secretion of enzymes and acids to break down nutrients. At birth, the lamb's rumen and reticulum are not yet functional.