Peristalsis and esophgeal musclulature.
It is difficult due to the apsence of gravity, so they will have to stand upside down to swallow fluid.
fin and tail
The pufferfish is known for its ability to swallow water to inflate itself into a larger, more round shape as a defense mechanism against predators. When threatened, the pufferfish gulps in large amounts of water to inflate its body, making it more difficult for predators to swallow.
If the body is upside down then it is no longer in the anatomical position. But no, it would not change.
They sleep upside down because they sleep in caves. When a predator enters the cave, they all fly around like maniacs to try and scare of the predator and it is harder to reach the bats when they are upside down.
There is no real way to swallow really. It is more like an instinct that is built into the body.
Much like bats use echo location as an extra sense, buffalo enables it to locate the nearest body of water.
Liquid water is vital as it enables your body to keep at a sustainable working pace, and keeps you hydrated as most life is mainly water. your body is made up of 80% water therefore you need to maintain that percentage.
The difference is that saltwater is salty, doesnt taste good, and your not supposed to swallow it. Also saltwater is good to gargle if you have a sore throat. In the other hand fresh water is healthy for you, cools you down, and you can swallow it. Also 70% of your body is made of fresh water.
Swallows use their beaks to catch and swallow insects while in flight. They do not have a specific body part dedicated solely to swallowing.
Swallowing is primarily controlled by a reflex action involving the muscles of the throat, which can function regardless of body position. The swallowing process involves the coordinated movement of the tongue, soft palate, and pharynx, allowing food or liquid to be pushed down the esophagus. This reflex action is designed to ensure that swallowing can occur effectively, even when upside down or in other unusual positions, as gravity is not the sole factor in this process.
Two ways, your body sends water to the lungs. This usually happens during infections of the lungs, such as pneumonia. Or you can "inhale" water. Your body is trained to "swallow" water, so you have to be intaking air when water is introduced.