[Ossification of the cartilage skeleton of the extremities of human embryos].
Certain sequence in appearance of ossification points has been stated in the cartilage models of the superior and inferior extremities of the human embryos at the end of the embryonal and the beginning of the fetal periods of development. The change in the size (length) of the ossification points in anlages of the long tubular bones during the successive stages of embryogenesis is of linear character and can be described by means of the equation y = ax + b, where y--age of the embryo (days), x--length of the osseous points. Coefficients a and b are calculated for estimation the age of the embryos according to the length of the osseous points in the anlages of the brachial, femoral and radial bones.
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D002356:Cartilage / Q000196:embryology*; D005121:Extremities / Q000196:embryology*; D005865:Gestational Age; D006801:Humans; D010012:Osteogenesis
Okostenenie khrashchevogo skeleta konechnosteĭ zarodysheĭ cheloveka.