BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
What is a cold? Detailed answer Directory / Big encyclopedia. Questions for quiz and self-education Did you know? What is a cold? Surely most of you know the joke about the doctor who says to a patient with a cold: "Only if you have pneumonia can I treat you." The common cold is not only one of the most annoying diseases to a person, but also the most mysterious. More than 90% of Americans get a cold every year, and more than half of them get sick more than once. You probably know the signs of a cold as well as any doctor. Your nose runs, you sneeze a lot, your throat hurts or tickles, and sometimes you get a headache. Later, cough and fever appear. In adults, colds are rarely serious. But in children, these signs may actually be the first symptoms of a more serious illness, such as measles or diphtheria. That is why children with a cold must be under the supervision of a doctor. A cold develops in one to three days and has three stages. The first is called "dry", it is not very long. The nose is blocked, the throat begins to tickle, and the eyes are watery. In the second stage, your nose is running. And finally, there is a cough and fever. Now for the mystery. What is a cold and what causes it? We can describe it as an acute inflammation of the upper respiratory tract. But medicine does not know what causes the common cold! It is assumed that the disease is caused by a specific virus. But here's what's interesting - it turns out that it is in our throat all the time, but it attacks when our body's resistance drops. The same happens with other bacteria found here. Thus, the cold virus weakens us, while others infect. The best way to avoid getting a cold is to keep your resistance high. Namely - eating well, resting enough, dressing for the weather and not communicating with people who have already caught a cold. Author: Likum A. Random interesting fact from the Great Encyclopedia: Are there seven wonders of the world now? Famous monuments of sculpture and architecture described by ancient historians and travelers:
Only the pyramids have survived to this day. People in antiquity found it hard to believe that the structures they called the "seven wonders of the world" would ever disappear. In fact, all of them, with the exception of one, ceased to exist! The only miracle that has survived to this day is the pyramid of Cheops in Egypt. Built about 5000 years ago, it is the burial place of the pharaoh and his wife. The walls of Babylon on the site of modern Iraq are considered the second wonder of the world. They were built around 600 BC. e. by the will of the famous king Nebuchadnezzar. Walls 100 m high, made of bricks, are now a pile of ruins. The third wonder of the world recognized the statue of Zeus in the city of Olympia, (Greece), created by the Greek sculptor Phidias. She was a figure 12 m high, dressed in golden clothes, the body of Zeus was carved from ivory, the eyes were made of precious stones. The sculpture has not reached us. The fourth miracle is the temple of the goddess Diana at Ephesus in what is now Turkey. The roof was supported by 18-meter rock monolith columns, and inside the temple were the best works of Greek artists. In 262 a.d. e. the invading Goths burned it down. The fifth of the wonders of the world was the tomb of King Mausolus, who died in 353 BC. e., in the city of Halicarnassus in the territory of modern Turkey. The construction was so luxurious and so expensive that today we call the richly decorated tombs mausoleums. The sixth wonder of the world was the Colossus of Rhodes, a bronze statue of the sun god Helios. It reached 32 meters in height and was located on the island of Rhodes. An earthquake in 224 BC e. destroyed it. And the seventh, the last of the wonders of the world is the lighthouse in Pharos. Its construction began around 283 BC. e. on the island of Pharos, off the coast of Egypt. It is believed that the lighthouse was almost 180 meters high, a fire was burning on top, showing the way to the ships to the port. The lighthouse served for over 1500 years until it was destroyed by an earthquake.
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