blastodisc


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Related to blastodisc: blastoderm

blas·to·disk

or blas·to·disc  (blăs′tə-dĭsk′)

blastodisc

(ˈblæstəʊˌdɪsk)
n
(Biology) another name for blastoderm
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.blastodisc - a layer of cells on the inside of the blastulablastodisc - a layer of cells on the inside of the blastula
layer - thin structure composed of a single thickness of cells
References in periodicals archive ?
One hour after fertilisation, the cytoplasm was pulled toward the animal pole, and a blastodisc was formed (1-cell stage) (Fig.
A small circular spot on the upper surface of the yolk mass is detected, it's considered as the blastodisc.
The zygote post fertilization (dpf) characterized through cytoplasmic continues growth to make the blastodisc at animal - cleavage period (0-1-4 h post fertilization (hpf), 1 day pole and the arrival of a different peri vitelline space and cleavage stage categorized through a series of mitotic partitions, caused in several blasto-meres.
The beginning of gastrula marks the end of the blastula stage, and it is followed by epiboly, defined as the movement of the yolk syncytial layer and blastodisc around the yolk cell.
Mid gastrula stage; in this stage the lower rim of the blastodisc thickened and formed a ring.
Early cell divisions were evident at the animal pole (opposite of the oil droplet) and eventually formed the blastodisc.
Earliest stage of eggs with asymmetrical blastodisc (Table 3), though the asymmetry may be an artifact of preservation.
The embryonic developmental stage was ranked as 0 = no embryos present beneath the abdomen; 1 = only yolk visible (newly spawned); 2 = blastodisc present but no eye pigmentation; 3 = eye pigmentation or eye development visible, cephalothorax and pleon not separated; or 4 = egg present, little yolk, carapace and pleon separate (Bauer and Delahoussaye, 2008).
During this period dividing cells were easily distinguishable prior to blastodisc formation, and little change in morphometry occurs.
The teleost embryo first appears as a clump of cells along the thickened margin of the blastodisc.