Страница 13 из 53
13. Bones. Chemical structure,
Bone tissue consists largely of a hard substance called the matrix. Embedded in the matrix are the bone cells, or osteocytes. Bone matrix consists of both organic and inorganic materials. The organic portion is made up chiefly of collagen fibres. The inorganic portion of matrix constitutes about two thirds of a bone's total weight. The chief inorganic substance is calcium phosphate, which is responsible for the bone's hardness. If the organic portion were burned out the bone would crumble under the slightest pressure. In the formation of intramembraneous bone, certain cells of the embryonic co
bone – кость
internal – внешний
phosphorus – фосфор
atrophy – атрофия
spongy – губчатый
tendon – сухожилие
ligament – связка
flexible – гибкий
periosteum – надкостница
osteoblast – остеобласт (клетка, образующая кость)
rigidity – неподвижность
shape – форма
to crumble – крошиться
to congregate – собираться
epiphyseal – относящийся к эпифизу
shaft – ствол, тело (длинной) кости, диафиз