TY  - JOUR
A1  - ,  
T1  - Development and segments of cartilage canals in the chick embryo. A light microscope study
JO  - Eur. J. Anat.
SN  - 1136-4890
Y1  - 1999
VL  - 3
SP  - 121
EP  - 126
UR  - http://www.eurjanat.com/web/paper.php?id=99030121
KW  - animal tissue
KW  - article
KW  - cartilage
KW  - chick embryo
KW  - embryo
KW  - embryo development
KW  - epiphysis
KW  - femur
KW  - histology
KW  - microscopy
KW  - nonhuman
KW  - ossification
KW  - perichondrium
KW  - tibia
N2  - Serial histological sections of distal femoral and proximal tibial epiphyses from 24 chick embryos with ages between the 8th and the 21st day of incubation were studied by light microscopic examination. Cartilage canals first appeared on the 9th and 10th day in the femur and tibia, respectively, as invaginations of the perichondrium. A completely developed canal is composed of three different segments: first, a proximal and funnel-shaped segment that retains a perichondral lining; second, a medium and tubular segment with no clear wall boundary; and third, a distal segment which shows a discontinuous wall structure composed of a fibrillar layer and a cellular layer; this segment features a globular end characterized by the absence of wall structure but rather, a close apposition of the canal's cellular elements with the neighboring cartilage matrix. The relationships of the canals and the secondary centres of ossification are commented.
ER  -