If I remember correctly, Peristalsis is what allows this to happen. Hope that helps :)
You turn Upside down.
While most animals have a difficult time swallowing their food when they are held upside down, there is one animal that cannot swallow when held in this manner. This animal is a chicken.
Yes
yes you have a esophagus for when you eat food that has muscles that pushes food down to your stomach, that's why you can swallow even if your upside down and you have a trachea for air.
Yes. It's slightly more difficult because you're working against gravity, though. The oesophagus is a tube-like organ, and the act of swallowing squeezes the food through the tube to down to the stomach, or sideways, or up as the case may be.
Peristalsis and esophgeal musclulature.
Propulsion of the esophagus is just a term for the way the cilia within the mucus lining of the esophagus move food down it into the stomach. You could swallow upside-down because of this.
Yes just like you can swallow upside-down! Because of a muscle called a sphincter that pushes food and fecal matter in one direction
Gravity doesn't pull food down through your digestive system, but an array of muscles squeeze it through. This is also why you can swallow when upside-down.
Chickens swallow differently than we do. We close our mouths and let our throats do the rest. Chickens open and close their mouths rapidly while tilting their heads up, they need gravity to do the rest.
The same way that a person can be upside-down on Earth and still swallow water. The ability to swallow has nothing to do with gravity; it has to do with the muscles in the esophagus which move food and water from the throat to the stomach.
Turn upside and put the food in your mouth 🤦