Smooth muscle and elastin.
The ridges are called rugae. They provide the stomach with more surface area for food. When food enters the stomach, these wrinkles expand and become stretched out. The purpose is to allow it to expand. This therefore allows expansion in volume of the pig.
The volume of the human stomach varies depending on the person. Generally, human stomachs have a volume about one liter, which is a little more than one quart. Since the stomach has the ability to expand, it can hold much more food.
The word 'compress' is the opposite of 'expand'.
The volume of an average adult's empty stomach is 1/5 of a cup.
The best synonym for "expand" in this context would be "increase in volume."
Drinking a gallon of water in a short period of time can overwhelm the stomach's capacity to hold liquids, leading to bloating. The excess water can also disrupt the body's electrolyte balance and cause the stomach to expand, giving the sensation of bloating.
A gas is a substance that does not have a fixed shape or volume. It can expand to fill the space available to it.
Water weighs 1kg per liter. If it is all turned to steam you will have 1kg of steam. Water expands to nearly 1700 times its original volume at 212 degrees.
Usually not. They can easily expand into a larger volume, or be compressed into a smaller volume.
Collide
The air will expand, increasing the volume
when there is a greater volume of stomach contents