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106 ses of long bones and in the middle portion of most other bones. Spaces in cancellous bone contain red bone marrow. This marrow, as opposed to yel‑ low marrow which is fatty tissue, is richly supplied with blood and consists of immature and mature blood cells in various stages of development. In an adult, the ribs, pelvic bone, sternum, vertebrae, as well as the epiphysis of long bones, contain red bone marrow within cancellous tissue. Vocabulary to the text: dense [ ’ dens] a плотный lack [læk] n недостаток; отсутствие (чего-л.) deposit [di ’ p ɔ zit] n отложение mature [mə ’ tjuə] a зрелый amount [ə ’ maunt] n количество replacement [ri ’ pleismənt] n замена, замещение split [split] v расщеплять surface [ ’ sə:fi] n поверхность layer [ ’ leiə] n слой spongy [ ’ sp ∧ nd ʒ i] a губчатый, спонгиозный bone marrow [ ’ mærəu] – костный мозг flat [flæt] a плоский broad [br ɔ: d] a широкий 2. Find in the text English equivalents for these words and word combinations: Кровеносные сосуды и нервы, кости плода, имеет сходство с кост‑ ной тканью, процесс отложения солей кальция, постепенное замеще‑ ние, через слизистую тонкого кишечника, в кровоток, находятся, ши‑ рокие на концах, прикрепление мышц, сесамовидные кости, губчатый слой кости, продукты распада, желтый костный мозг, жировая ткань, так же как. 3. Read the text once again. Put the questions in the order they are answered in the text, then answer the questions. • What are bones composed of? • Why is vitamin D necessary for us? • Where are short bones found? • When is cartilage tissue replaced by osseous tissue? • What is ossifcation? • What is the periosteum? • What bones have broad ends?
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