Langerhans cells are dendritic cells but are members of the immune system and function as antigen-presenting cells. They have also been found in other parts of the body, including the oral cavity and lymph nodes.
Merkel cells are found in the basal epidermis and appear function in concert with nerve fibers that are closely associated with them. At the electron microscopic level, their cytoplasm contains numerous membrane-bound granules that resemble those of catecholamine-pro-ducing cells.
New words
epidermis – эпидермис
dermis – дерма
largest – самый большой
approximately – приблизительно
weight – вес
to protect – защищать
injury – рана
cytoplasmic – цитоплазматический
several – несколько
level – уровень
flat – плоский
palm – ладонь
thick – толстый
pigment – пигмент
melanin – меланин
nerve – нерв
closely – тесно
Запомните следующие словосочетания, в которых артикль не употребляется.
1) at – school;
2) at – home;
3) at – work.
Вставьте артикль, где необходимо.
1. I have two… sisters. My… sisters are… students.
2. We are at… home.
3. My… brother is not at… home, he is at. school.
4. My. mother is at… work. She is… doctor.
5. I am not… doctor.
6. I have no… sisters.
7. He is not… pilot.
8. I have thirty-two… teeth.
9. He has. child.
10. She has two… children. Her children are at… school.
11. Is your father at… home? – No, he is at… work.
12. Where is your… brother? – He is at… home.
Answer the questions.
1. What is epidermis?
2. What is the largest body organ?
3. How many per cents does the integument comprise of total body weight?
4. What is the main function of the integument?
5. Where it also participates in?
6. What is the outermost layer of the integument?
7. What is stratum granulosum consists of?
8. Where is the a thin, transitional zone of flat eosinophilic?
9. What keratin proteins provide?
10. What cells produce the pigment melanin?
Make the sentences of your own using the new words (10 sentences).
Find the definite and indefinite articles in the text.
Find one word, which is a little bit different in meaning from others (найдите одно слово, которое немного отличается от других по смыслу):
1) a) rain; b) epidermis; c) dermis;
2) a) weight; b) person; c) poster;
3) a) palm; b) foot; c) shoes;
4) a) brush; b) pigment; c) skin;
5) a) lash; b) wound; c) injury.
