Вопрос № 223475 - Английский язык

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Blood is the red fluid that circulates through the body by way of the blood vessels. The adult human body contains between 5 and 6 quarts of blood, weighing about 7 to 8 pounds and accounting for about 5% of the body weight. If about one-third of the blood is lost, death usually occurs (unless the blood is replaced). A pint of blood, however, can be readily spared at proper intervals. Blood in the arteries is bright red in color; blood in the veins is much darker, sometimes a brownish red.
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Blood glucose level
1. The blood sugar concentration or blood glucose level is the amount of glucose (sugar) present in the blood of a human or animal. The body naturally tightly regulates blood glucose levels as a part of metabolic homeostasis.
2. Glucose is the primary source of energy for the body’s cells, and blood lipids (in the form of fats and oils) are primarily a compact energy store. Glucose is transported from the intestines or liver to body cells via the bloodstream, and is made available for cell absorption via the hormone insulin, produced by the body primarily in the pancreas.
3. The mean normal blood glucose level in humans is about 5.5 mmol/L; however, this level fluctuates throughout the day. Glucose levels are usually lowest in the morning, before the first meal of the day (termed «the fasting level»), and rise after meals for an hour or two by a few millimolar.
4. Blood sugar levels outside the normal range may be an indicator of a medical condition. A persistently high level is referred to as hyperglycemia; low levels are referred to as hypoglycemia. Diabetes mellitus is characterized by persistent hyperglycemia, and is the most prominent disease related to failure of blood sugar regulation. Intake of alcohol causes an initial surge in blood sugar, and later tends to cause levels to fall. Also, certain drugs can increase or decrease glucose levels.
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Is there anything more important than health? I rather doubt it. If your body suffers from any disorder your mind suffers with the body too. You can’t be good either at work or at studies. Aches and pains lead to irritation, nervous breakdown, exhaustions and apathy.

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Doctors treat patients. If you have a headache, toothache, backache, stomachache or earache, if you have a sore throat, eye or finger, if you feel pain in any part of your body, if it hurts you to move – you need help. First of all you ought to turn to your physician.

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Exercises are necessary and very important to every person.
Physically inactive people get old earlier than those who exercise.
If you do daily exercises you feel refreshed, you have good posture. Good posture lifts spirits. Poor posture often causes fatigue.
Pay attention to the way you stand, walk and sit. Make up your mind that you will do your daily exercises 10 minutes without fail.

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The clinical medicine and safeguard of people’s health greatly developed in Roman times. The name of Galen is widely known. Galen worked first as a surgeon at a school for gladiators. He went to Rome when he was thirty-two years old and there he had much practice, but he continued to experiment on living animals, especially apes and pigs. The Roman army always had a well organized service of surgeons. The school for gladiators was an ideal school for training in surgery.