Organs Reflex
Cold diuresis
Being cold makes you need to urinate. The body pulls blood away from the skin into the core, the heart reads this as too much blood, and the kidneys are told to dump water.
Everyone
Internal organs
The gut, lungs, kidneys, bladder, and glands.
Showing 8 oddities.
The organs in the chest and abdomen work without any input from you, moving gas, blood, and waste on a schedule you do not set. Most of the sounds and events in this region are that machinery being briefly audible or noticeable.
Stomach growling is gas and liquid pushed through the gut by ordinary muscle waves. Hiccups are a sudden, involuntary jerk of the diaphragm paired with a snap of the voice box. Voluntary burping is one of the few organ events people can learn to trigger on command, by swallowing air on purpose.
What connects the entries is a body cavity you cannot see into, doing continuous work you only notice at certain moments. Some of that noticing is startling. Almost none of it means anything is wrong.
Results narrow the list below as you type.
Mainly this region
Organs Rare ability
Extraordinary breath-holding
Untrained adults usually stop within a minute or two. The best freedivers manage over 11 minutes, and over 29 minutes after breathing pure oxygen. One group of sea nomads has evolved larger spleens for diving.
Trained divers only; no count
Organs Sound
Hiccups
A hiccup is a sudden jerk of the diaphragm followed by the voice box snapping shut. Everyone gets them, even before birth. The record case lasted 68 years.
Everyone
Organs Sound
Stomach growling
The rumble from your belly is gas and liquid being pushed through your gut by waves of muscle. It is louder when you are hungry because there is less food to muffle it.
Everyone
Organs Trick
Voluntary burping
Swallowing air on purpose and letting it back up as a belch. Nobody has counted how many people can do it. The loudest recorded burp reached 112.4 decibels.
No formal count
Also involves this region
These entries belong to another region first, and touch this one too.
Nerves Involuntary
Pee shivers
A brief involuntary shudder during or just after urinating. Many people seem to get it, men more often than women. It is widely known and almost completely unstudied.
Nobody has counted it
Muscle Involuntary
Proctalgia fugax
A sudden, cramping pain deep in the rectum that lasts seconds to minutes and then goes away completely. It has no known cause, and it is harmless.
About 7% of adults. Studies range from 4% to 18%.
Body Variation
Situs inversus
All the organs in the chest and belly sit on the opposite side from usual, as in a mirror. About 1 in 10,000 people are built this way, and most are healthy.
About 1 in 10,000 people