The human heart contracts from the first moment of life until the last one.
Physiologists have determined that in the adult the heart makes from 60 to 72 beats per minute.In children the rate of heartbeat is much higher.
<span>Each beat of the heart is followed by a period of rest for the cardiac muscle. Each wave of contraction and a period of rest following it compose a cardiac cycle. </span>
<span>Each cardiac cycle consists of three phases:the first phase of short contraction is called the atrial systole.The second phase of a contraction of both ventricles is called the ventricular systole. The period of rest of the cardiac muscle is called the diastole.
</span>Heart disorders fall into two broad groups: congenital and acquired. Congenital heart defects are caused by structural defects. Acquired heart disease is mainly due to rheumatic fever.Congenital defects may result in cyanosis.The patient has blue lips, blue-finger and toe-nails.Symptoms depend on the type of heart disease. Sometimes, the defect is picked up on a routine examination; at other times there may by breathlessness, difficulty in walking or running, swelling of feet and puffiness of face.
Человеческое сердце сокращается с первого момента жизни до последнего. Физиологи установили, что у взрослого человека сердце совершает от 60 до 72 ударов в минуту.У детей частота пульса значительно выше. После каждого удара сердца наступает период отдыха для сердечной мышцы.Каждая волна сокращения и период отдыха после нее составляют сердечный цикл. Каждый сердечный цикл состоит из трех фаз:первая фаза короткого сокращения называется предсердной систолой.Второй этап сокращения обоих желудочков называется систола желудочка. Период отдыха сердечной мышцы называется диастола. Сердечные болезни(расстройства) делятся на две большие группы: врожденные и приобретенные. Врожденные пороки сердца обусловлены структурными дефектами. Приобретенные пороки сердца возникают в основном из-за ревматического артрита(лихорадки).Врожденные дефекты могут привести к цианозу.У пациента наблюдаются синие губы,синие пальцы рук и синие ногти на пальцах ног.Симптомы зависят от типа болезни сердца. Иногда, это обнаруживается( выявляется ) при обычном осмотре;в других случаях может быть одышка, затруднения при ходьбе или беге, отеки ног и одутловатость лица.
Ann never has been before to the Tower of London.
2. Make up sentences using give words.
<span>
1) Alan does not think his friends envy him.
2) Will you forgive your friend if he betrays you?
3) She often ignores her parents' advice.
3. Open the brackets using the Passive Voice.</span>
<span>
1) This house is quite old. It was built in 1935.
2) The post office is closed on Sundays.
3) The computer is used every day.
4) The work will be done next week.
5) The new American show will be on tomorrow
evening.
<span>6) The telegram was sent two days ago.</span>
4. Complete the sentences. Use: looks like, feel
like doing something, somebody's likings, are alike, homelike.</span>
<span>
1) His study is more homelike than the drawing
room.
2) My sister looks like my mother.
3) Mary and Nick are alike very much.
4) I feel like sleeping now.
<span>5) The agreement we have is to my likings.
5. Choose the correct form.</span></span>
<span><span>
1) They are leaving for Moscow tonight. They have
already bought tickets.
2) I think I will visit my friend this week if I
have free time.
3) I hope our team will win this game.
4) On Sunday we are going to the Zoo. My father
has bought tickets.
5) I am sure I will pass my exams perfectly.</span></span>
<span> </span>
