Arterioles are the smallest components of the arterial tree. Generally, any artery less than 0,5 mm in diameter is considered to be a small artery or arteriole. A subendothelial layer and the inter nal elastic membrane may be present in the largest of these vessels but are absent in the smaller ones. The media is composed of sev eral smooth muscle cell layers, and the adventitia is poorly devel oped. An external elastic membrane is absent.
New words
arteries – артерии
to be classified – классифицированный
according – соответственно
their – их
size – размер
appearance – вид
tunica – оболочка
major – главный
elastic – упругий
conducting – проведение
arteries – артерии
to include – включать
aorta – аорта
branches – ветви
up to – до
layers – слои
smooth – гладкий
may – может
Запомните следующие застывшие словосочетания.
In a loud voice In a low voice In an angry voice In a thin voice
Заполните пропуски, где необходимо.
1. She shouted in. low voice.
2. He told us the poem in. loud voice.
3. The children asked ice-cream in. thin voice.
4. The teacher cried at the pupils in. angry voice.
5. Bill Robins was… very rich man.
6. He was. richest man in. village.
7. Pete is… tallest boy in our class.
8. Nick is… shortest boy, but he is very strong.
9. He is… stronger than many boys who are taller than he.
10. I think Nick is… strongest boy in class.
Перед превосходной степенью прилагательных употребляется определенные артикль.
E. g. Asia is the largest continent.
My brother is the best pupil in his class.
Вставьте артикль, где необходимо.
1. Bill Robins was… very rich man. He was… richest man in… village.
2. Pete is… tallest boy in our class. Nick is… shortest boy, but he is very strong.
3. He is… stronger than many boys who are taller than he.
4. I think Nick is… strongest boy in class.
5. Granny often tells us… long stories. Today her story was still… longer.
6. It was… longest story. She began telling it after… dinner and finished it before… supper.
7. But… story was very interesting. I think it was… most interesting of Granny's stories.
8. Which was… most difficult exercise in. test-paper?
9. Which is… best season of the yea?
10. February is… shortest month of the year.
Answer the questions.
1. How are arteries classified?
2. What do large elastic conducting arteries include?
3. What is the tunica intima composed of?
4. What does an internal elastic membrane mark?
5. Is the tunica media thick?
6. Is the tunica adventitia a longitudinally oriented collection of col-lagenous bundles?
