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Why do people sneeze when walk into bright sunlight?
That is because of how some people's nerves are routed. For some, the optic nerves are very close to the vagus nerve and may even share the same nerve sheath. The vagus nerve is what controls the heart, lungs, diaphragm, part of the vocal folds, and digestive tract. A sneeze is a spasm of the diaphragm. So when a very strong stimuli passes through the optic nerve, some crosstalk may occur and stimulate the vagus nerve, causing a spasm of the diaphragm and the sudden expulsion of air through the lungs and out the mouth. So if the mouth or lungs have anything in them at the time, it comes out along with the air, and thus saliva and possibly phlegm go everywhere.
What did the first meal on the moon consist of?
Most of us have probably realized that after eating corn, it shows up in our stool. The corn in our stool can appear only hours after we eat it. Rest assured, corn in the stool is normal, and the reason we see the corn relates largely to our digestive tract, and also to evolution.Millions of years ago, our digestive systems were different. Primitive man was not a big meat eater. Primitive man had a digestive system with a longer digestive tract that was far better equipped to digest plant and vegetable matter. Back then, the appendix likely played a role in digestion -- a role it does not play today.Our teeth were different then, too. We had larger molars and smaller incisors. Larger molars meant that the difficult-to-digest plant material could be well chewed and mashed. Today, our teeth are smaller and many of us even have problems with our wisdom teeth (our largest molars), which are being phased out by evolution because our diets today really do not require them. (Our jaws are becoming smaller, and as a result the wisdom teeth have less room to grow in.)So how does this all relate to corn, and why it is seen in the stool? Since we have smaller teeth, we chew our food less effectively, and more of what we eat is swallowed only partially chewed, or not chewed at all. With corn, some of the kernels will be chewed fully, some partially, and the others will be unchewed and swallowed whole. Our digestive system today is not that good at digesting plant material anymore, much less whole kernels. They pass through our stomach and intestines, and appear in our stool to confound and entertain us.If you would rather not see any corn in your stool, I recommend that you just chew each mouthful into a mushy mixture free of any whole kernels.One last point I want to make is that it is not difficult for our digestive systems to pass corn kernels. It is really amazing what the digestive system can tolerate and pass. Drugs are frequently smuggled into the country by individuals who swallow balloons or condoms filled with the drugs. (These people are called "body packers.") In addition, I have read on several occasions about people who unintentionally swallowed their dentures, only to pass the dentures in their stool a few days later. I have also read of children swallowing thermometers passing them just the same.The human digestive system really is fascinating. But remember that we are slowly evolving over time -- our digestive systems are constantly adapting to our diets and our environments. Our digestive systems of today will not be the same as the digestive systems of humans thousands of years from now. Remember this the next time you enjoy your corn, or broccoli, or any other difficult-to-digest food product -- what kind of food might future generations be spotting in their poop?
How does microgravity affect eating and drinking in space?
1) gravity holds you, and everything on earth, on the ground. 2) gravity hold the moon in orbit around the earth, and the moon's gravity is part of what makes tides on the earth. 3) the gravity of the sun holds earth, and the other planets, in orbit, keeping us from flying out into empty space. Also, it works with the moon to create tides on earth.
Apollo 13 who gets ill in space?
Fred Haise contracted a Urinary Tract Infection while in transit.
What is the procedure for a cystoscopy?
Cystoscopy (cystourethroscopy) is a diagnostic procedure that is used to look at the bladder (lower urinary tract), collect urine samples, and examine the prostate gland.
What is the process that moves food through the digestive tract?
PeristalsisPeristalsis
What moves around food in the body?
Food moves through the digestive tract.
What are the nutrients that moves through the digestive tract?
Fiber is the nutrient that helps move food through the digestive tract. It provides bulk, which activates the stretch receptors in the muscles of the digestive tract, stimulating them to activity.
In earthworms how is food passed through the digestive tract?
The food is passed through the digestive tract when the worm moves. The movement causes the muscles to contract and move the food through the system.
The type of involuntary muscle that moves food through the digestive tract is called?
smooth muscle
As food moves through the digestive tract it spends the most time in the?
large intestine (colon)
Which two actions help to propel a bolus of food through the digestive tract?
Propulsion is the movement of food down the esophagus and peristalsis is the contractions in the stomach walls that moves food through the digestive tract.
What is it that moves food along through the digestive tract even when we are lying down or floating in the weightlessness of space?
Peristalsis, a series of muscle contractions in the intestines and stomach that help to push the food through your digestive tract.
What makes up the fiber that absorbs toxins as it moves through the intestinal tract of an animal's digestive system?
Cellulose
What muscle or tissue moves food through the digestive tract?
it goes to the small intenstine but breaks down by pepsin
Food moves through the digestive tract by wavelike contractions called?
Peristalsis is a series of involuntary smooth muscle contractions along the walls of the digestive tract that move food through the digestive tractperistalsis
What is a wave like muscular movement that pushes food through the alimentary canal is known as the?
Food moves through the digestive tract as a result of peristaltic motion, or peristalsis.
