Английский язык для медиков: конспект лекций

Stratum granulosum consists of flat polygonal cells filled with ba-sophilic keratohyalin granules. Viewed at the electron microscopic level, these cells also contain numerous mem brane-coating granules. Stratum corneum is the superficial stratum of dead cells and consists of several to many layers of flat, anucleated, and cornified (kerati-nized) cells. In the epidermis of the palms and soles, a thin, transitional zone of flat eosinophilic or pale-staining anucleated cells may occur as the stratum lucidum. This layer is found only in regions with a thick strata corneum.

Cells of the epidermis: keratinocytes are the most numerous and are responsible for the production of the family of keratin proteins that provide the barrier function of the epidermis.

Melanocytes are derivatives of neural crest ectoderm. They are found in the dermis and are also scattered among the keratinocytes in the basal layers of the epidermis. These dendritic cells produce the pigment melanin in the form melanosomes that are transferred to kerati-nocytes.

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?