There is no uniform definition of what an organ is. But doctors usually mean a tissue that plays a very specific role in the body. According to that definition, salivary glands and blood are also organs, but most of the time we think of larger, better defined tissues, such as the heart and kidneys.
A sneeze is the outer defense ring of the body. For example, if a cold virus or dust particles penetrate your nose, your body shoots them out again at a sneeze of 65 kilometers per hour. The sneeze is caused by a reaction of the mucous membrane in the nose - the moist part in the nostrils that produces 1 liter of aqueous mucus per day, so snot.
A meeting with the meter-long tentacles of a jellyfish can lead to fiery red swellings and muscle cramps and drop into the water every beach holiday. But urine is not the solution. Jellyfish tentacles are covered with thousands of nettle cells that shoot needles with a paralyzing nerve poison through the skin.
Although cold drinks are tempting in the summer, the body is better off with a cup of tea. Researchers at the University of Ottawa discovered this in 2016. The reason is that hot drinks increase body temperature. The hypothalamus records that. Brains determine the evaporation of sweat This area in the center of the brain controls everything from your organs to your body temperature, and sends signals to the blood vessels and sweat pores of your skin, which then expand and open.
The summer weather stimulates hair growth, is a widespread idea, and there is something in it. The heat and the sun's rays create favorable conditions for your hair, making it grow a little faster in the summer than on gray and cold winter days. In a Chinese study from 2014, the researchers discovered that the hair grows on average 0.4 millimeters per day in the summer, while the growth in the winter falls to 0.375 millimeters.
Ceramics printed in 3D grows with bones With a mixture of calcium phosphate and fat, researchers from the Danish Syddansk Universitet print ceramic material that grows with existing bones. Tests with mice show that the artificial bones even produce marrow. Particle3D.com 3D-printed hip of titanium is more secure Hip prostheses sometimes loosen up over time.
The rare phenomenon fetus in fetu, better known as parasitic twin, means that someone has an undeveloped twin brother or sister in their body. It occurs in one in 500,000 newborns and occurs because one egg in the womb swallows another egg. The 'encapsulated' twin lives on the blood of its host.
A swarm of mosquitoes on the terrace can ruin every pleasant summer evening. And if you think that you are just a little more often than your company and more often with those itchy bumps on your skin, that may be right. The bloodthirsty insects do not put their snout first in the best. Some people are very tasty According to studies, an estimated 20 percent of people are unlucky that they are particularly tasty for mosquitoes compared to the rest of the population.
Idea 1: Jellyfish Idea: "You have to pee on a jellyfish bite" An encounter with the meter-long tentacles of a jellyfish can lead to fiery red swellings and muscle cramps and drop into the water every beach holiday. But urine is not the solution. Jellyfish tentacles are covered with thousands of nettle cells that shoot needles with a paralyzing nerve poison through the skin.
Your intestinal bacteria keep a close eye on whether your body is aging. This is the conclusion of a new study by researchers at the Insilico Medicine institute in the US. They examined intestinal bacteria in samples from 1165 people from all over the world and noted which bacteria were present and how many per species.
We apply sunscreen to protect ourselves against the harmful ultraviolet rays of the sun. A cream can contain a mineral or a chemical sun filter, or both. You get a mineral sunscreen if you add white dyes such as zinc oxide or titanium oxide to the cream.
For example, blisters appear on your feet during a long walk or on your hands if you have been working with garden tools for a long time. If the horny layer - the top layer of your skin - has repeated contact with, for example, the inside of your shoe, the connection between the cell layers becomes deeper in the skin and moisture-filled cavities are formed.
The abuse of prescription drugs is increasing hand in hand and the trade in cocaine and opium breaks all records. The United Nations Office on Drugs and Crime established this in a report last year. But narcotic and mind-expanding drugs not only produce dubious records. Some substances, such as cannabis, appear to have a positive effect on a number of diseases.
If you break your leg, the body will recover automatically if you give it a rest. And with growing children, the bones get longer and thicker every year. But how this process works at the molecular level was a mystery for a long time. Bone tissue with osteoporosis (l) has a looser and more porous structure than healthy bone tissue with its dense, fine-meshed structure (r).
1. If you dress warmly, then you don't catch cold © Shutterstock You also had a few little clothes on ... All sorts of smarties know exactly what happens when the flu has struck and your body temperature and snot production are rising. However, no research has shown a direct link between cold and an increased susceptibility to cold and flu viruses.
Melanin makes the skin dark and less vulnerable A skin that is naturally or sun-dark, owes its color to the pigment melanin. This pigment converts light energy into heat. For example, Africans have a very high melanin content, making their skin dark. It is also better protected against the dangerous UV rays of the sun, and burns less quickly.
The groove under your nose, the filtrum, bears witness to the puzzle that is made in the womb during the formation of the face. Here all the major features come together. This is an extremely complex process that is so precise that your nose can get almost exactly the same shape as your father's.
It is 1839. Charles Darwin is at home in Kent, England, and he cannot take his eyes off his newborn son. The young researcher is overwhelmed by his father's feelings, but also remains a scientist. He notes everything about the baby's first grimaces. 'With one of my own children I have often observed that the first sign of a gradually rising scream was a small frown [...].
It is not immediately one of the most charming products of our body, but do not be fooled by the appearance. Earwax is really very important. 1. Earwax consists of dead skin cells You don't see it, but your earwax is an exciting cocktail made of all kinds of waste materials. In addition to dirt and tallow, earwax also consists of the dead skin cells of your ear canal.
Australian researchers discovered a gene that determines whether mice get fat or not, regardless of what they eat. The discovery may lead to an overweight pill in people. You lose weight from brown fat The gene, RCAN1, codes for proteins that determine the distribution of white and brown fat in the body.
Unlike almost all other organs, the skin has the unique ability to repair itself. Even large wounds can often heal without forming scars. The white blood cells of the immune system cause inflammation, which ultimately has a healing effect. Inflammation promotes natural healing 10 minutes - coagulation The healing process of the skin starts when the damaged blood vessels (red dots) contract.