ossification$55831$ - определение. Что такое ossification$55831$
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Что (кто) такое ossification$55831$ - определение

POINT WHERE OSSIFICATION OF THE CARTILAGE BEGINS
Center of ossification; Ossification centre; Ossification centres; Ossific center; Secondary ossification center; Ossification centers; Ossific centers
  • Section of fetal bone of cat. ir. Irruption of the subperiosteal tissue. p. Fibrous layer of the periosteum. o. Layer of osteoblasts. im. Subperiosteal bony deposit.

Ossification center         
An ossification center is a point where ossification of the cartilage begins. The first step in ossification is that the cartilage cells at this point enlarge and arrange themselves in rows.
Endochondral ossification         
  • 450px
  • Drawing of part of a longitudinal section of the developing femur of a rabbit. a. Flattened cartilage cells. b. Enlarged cartilage cells. c, d. Newly formed bone. e. Osteoblasts. f. Giant cells or osteoclasts. g, h. Shrunken cartilage cells. (From “Atlas of Histology,” Klein and Noble Smith.)
REPLACEMENT OSSIFICATION WHEREIN BONE TISSUE REPLACES CARTILAGE.
Endochondral; Intercartilaginous ossification; Endochondral bone; Enchondral ossification; Enchondral; Cartilage bone; Autostoses
Endochondral ossificationEtymology from /endon, "within", and χόνδρος/chondros, "cartilage" is one of the two essential processes during fetal development of the mammalian skeletal system by which bone tissue is produced. Unlike intramembranous ossification, the other process by which bone tissue is produced, cartilage is present during endochondral ossification.
Endochondral         
  • 450px
  • Drawing of part of a longitudinal section of the developing femur of a rabbit. a. Flattened cartilage cells. b. Enlarged cartilage cells. c, d. Newly formed bone. e. Osteoblasts. f. Giant cells or osteoclasts. g, h. Shrunken cartilage cells. (From “Atlas of Histology,” Klein and Noble Smith.)
REPLACEMENT OSSIFICATION WHEREIN BONE TISSUE REPLACES CARTILAGE.
Endochondral; Intercartilaginous ossification; Endochondral bone; Enchondral ossification; Enchondral; Cartilage bone; Autostoses
·adj Growing or developing within cartilage;
- applied ·esp. to developing bone.

Википедия

Ossification center

An ossification center is a point where ossification of the cartilage begins. The first step in ossification is that the cartilage cells at this point enlarge and arrange themselves in rows.

The matrix in which they are imbedded increases in quantity, so that the cells become further separated from each other.

A deposit of calcareous material now takes place in this matrix, between the rows of cells, so that they become separated from each other by longitudinal columns of calcified matrix, presenting a granular and opaque appearance.

Here and there the matrix between two cells of the same row also becomes calcified, and transverse bars of calcified substance stretch across from one calcareous column to another.

Thus, there are longitudinal groups of the cartilage cells enclosed in oblong cavities, the walls of which are formed of calcified matrix which cuts off all nutrition from the cells; the cells, in consequence, atrophy, leaving spaces called the primary areolæ.