JК
Английский язык :: Беликова Елена
Страница: 22 из 68Ultrastructurally, platelets contain two portions: a peripheral, light-staining hyalomere that sends out fine cytoplasmic processes, and a central, dark-staining granulomere that con tains mitochondria, vacuoles, glycogen granules, and granules. Platelets seal minute breaks in blood vessels and maintain endothelial integrity by adhering to the damaged vessel in a process known as platelet aggregation. Platelets are able to form a plug at the rupture site of a vessel because their mem brane permits them to agglutinate and adhere to surfaces.
Platelets aggregate to set up the cascade of enzymatic reac tions that convert fibrinogen into the fibrin fibers that make up the clot.
New words
mesodermal – мезодермальный
erythrocytes – эритроциты
platelets – тромбоциты
carbon – углерод
dioxid – диоксид
span – промежуток
light-staining – легкое окрашивание
to aggregate – соединяться
19. Blood. Formed elements of the blood. Leukocytes
Leukocytes, or white blood cells, are primarily with the cellular and humoral defense of the organism foreign materials. Leukocytes are classified as granulocytes (neutrophils, eosinophils, basophils) and agranulocytes (lympmonocytes).
Granulocytes are named according to the staining properties of their specific granules. Neutrophils sare 10–16 mm in diameter.
They have 3–5 nuclear lobes and contain azurophilic granules (lysosomes), which contain hydrolytic enzymes for bacterial destruction, in their cytoplasm. Neutrophils are phagocytes that are drawn (chemotaxis) to bacterial chemoattractants. They are the primary cells involved in the acute inflammatory response and represent 54–62 % of leukocytes.
Eosinophils: they have a bilobed nucleus and possess acid granulations in their cytoplasm. These granules contain hydrolytic enzymes and peroxidase, which a discharged into phagocytic vacuoles.
Eosinophils are more numerous in the blood during allergic diseases; they norma asent only – 3 % of leukocytes.
Basophils: they possess large spheroid granules, which are basophilic and metachromatic
Basophils degranulate in certain immune reaction, releasing heparin and histamine into their surroundings They also release additional vasoactive amines and slow reacting substance of anaphylaxis (SRS-A) consisting of leu-kotrienes LTC4, LTD4, and LTE4. They represent less than 1 % – of leukocytes
Agranulocytes are named according to their lack of specific granules.
Platelets aggregate to set up the cascade of enzymatic reac tions that convert fibrinogen into the fibrin fibers that make up the clot.
New words
mesodermal – мезодермальный
erythrocytes – эритроциты
platelets – тромбоциты
carbon – углерод
dioxid – диоксид
span – промежуток
light-staining – легкое окрашивание
to aggregate – соединяться
19. Blood. Formed elements of the blood. Leukocytes
Leukocytes, or white blood cells, are primarily with the cellular and humoral defense of the organism foreign materials. Leukocytes are classified as granulocytes (neutrophils, eosinophils, basophils) and agranulocytes (lympmonocytes).
Granulocytes are named according to the staining properties of their specific granules. Neutrophils sare 10–16 mm in diameter.
They have 3–5 nuclear lobes and contain azurophilic granules (lysosomes), which contain hydrolytic enzymes for bacterial destruction, in their cytoplasm. Neutrophils are phagocytes that are drawn (chemotaxis) to bacterial chemoattractants. They are the primary cells involved in the acute inflammatory response and represent 54–62 % of leukocytes.
Eosinophils: they have a bilobed nucleus and possess acid granulations in their cytoplasm. These granules contain hydrolytic enzymes and peroxidase, which a discharged into phagocytic vacuoles.
Eosinophils are more numerous in the blood during allergic diseases; they norma asent only – 3 % of leukocytes.
Basophils: they possess large spheroid granules, which are basophilic and metachromatic
Basophils degranulate in certain immune reaction, releasing heparin and histamine into their surroundings They also release additional vasoactive amines and slow reacting substance of anaphylaxis (SRS-A) consisting of leu-kotrienes LTC4, LTD4, and LTE4. They represent less than 1 % – of leukocytes
Agranulocytes are named according to their lack of specific granules.