Uliana7003
21.03.2023 06:25

сделать правильно!! Очень нужно Ex. 1. Read the text, using the dictionary
EVOLUTION OF THE HEART
Beginning with the invertebrates, the lowest members of the animal kingdom, the heart is a simple propulsive muscular tube. In the fish the heart has evolved into a chambered organ with an atrium, or receiving chamber, and a ventricle, a thick-walled pumping chamber. This development was necessary because the vertebrates of which the fish are the lowest class have a more complicated structure and are generally larger than the invertebrates and require more oxygen. With the development of lungs in the higher vertebrates the atrium became divided into two parts by the formation of a dividing wall called septum.
Thus, in man and other animals with a four-chambered heart blood from the body cells enters the heart at the right atrium, and from here it passes into the right ventricle from which the blood is pumped through the pulmonary artery towards the lungs. The oxygenated blood is carried back to the heart through the pulmonary veins which empty into the left atrium. From the left atrium the blood passes into the left ventricle which then pumps it into the aorta for the distribution throughout the body.

Ex. 2. Complete the sentences:
1. An atrium is …
2. A ventricle is a …
3. The septum is …
4. Blood enters the heart …
5. Then it passes ...
6. The blood is pumped … towards the lungs.
7. The oxygenated blood is carried back to the heart …
8. They empty …
9. The left ventricle pumps the blood …

Нажмите на рекламу ниже и сразу увидите ответ
Популярные вопросы:
Ответ:
qsn50857
17.12.2021 14:26

1. My brother can watch TV from morning till evening.

 Can my brother watch TV from morning till evening?

 What can my brother watch  from morning till evening?

 

2. My sister can speak English very well.

Can my sister speak English very well?

Who can speak English very well?

 

3. My brother could play the piano very well when he was a child.

Could my brother play the piano very well when he was a child?

Who could play the piano very well when he was a child?

 

4. Yesterday I could go to the theatre, but I was tired and went home.

Could I yesterday go to the theatre, but I was tired and went home?

When could I go to the theatre, but I was tired and went home?

 

5. My sister will be able to help you tomorrow.

Will my sister be able to help you tomorrow?

When will my sister be able to help you?

 

6. These students will be able to study German next year.

Will these students be able to study German next year?

Who will be able to study German next year?

0,0(0 оценок)
Ответ:
Alidisa1202
21.04.2023 20:54

One night I had a dream. I was flying in a small spaceship with some aliens. They were all different, perhaps they were from different planets. As I understood it, it was a public intergalactic transport. 

I was scared a little. The ship stayed at all the stops, and the crowds of people came in and went out.
  At the last stop I found out that there was nobody around me and I had to get out. I was surprised when I had learnt that people in this planet could speak Russian. This planet was called Tron. I noticed that there was a very beautiful nature there. After a while,  a boy came up to me, his name was Klark. I made friends with him. Then we went for a walk: he showed me the animals that could fade and much more interesting. But soon I woke up. I was so pity.

0,0(0 оценок)
Полный доступ
Позволит учиться лучше и быстрее. Неограниченный доступ к базе и ответам от экспертов и ai-bota Оформи подписку
logo
Начни делиться знаниями
Вход Регистрация
Что ты хочешь узнать?
Спроси ai-бота