blastulan.

/ˈblastjʊlə/

Etymology: modern Latin, < Greek βλαστός sprout + diminutive suffix (see -ule suffix). Compare blastule n.

Embryology.

An embryo, typically composed of cells arranged in a sphere enclosing the blastocœle.

ΘΚΠ

the world > life > biology > biological processes > procreation or reproduction > embryo or fetus > [noun] > blastula

periblastula1876

macromere1877

micromere1877

blastula1887

amphiblastula1888

1887 A. C. Haddon Introd. Study Embryol. ii. 21 The result of segmentation is the formation of a multicellular body, usually enclosing a central cavity—‘Segmentation cavity’ or ‘Blastocœl’. The body itself is variously called ‘Blastula’ or ‘Blastosphere’.

1887 A. C. Haddon Introd. Study Embryol. ii. 50 Segmentation..of Sponges..results in the formation of a hollow blastula.

1893 J. Tuckey tr. B. Hatschek Amphioxus 43 An equal segmentation leading to a blastula without any well-defined main axis.

1924 E. W. MacBride Study of Heredity iii. 70 When the [sea-urchin's] egg has divided into about 1000 cells these form a little hollow balloon or vesicle known as the blastula.

1962 D. Nichols Echinoderms x. 120 The resulting blastula is oval, hollow and ciliated all over.

Derivatives

blastuˈlation n. the formation of the blastula.

ΘΚΠ

the world > life > biology > biological processes > procreation or reproduction > embryo or fetus > embryo development processes > [noun]

fetalization1819

segmentation1851

maceration1873

neurulation1878

blastulation1889

concrescence1890

cell lineage1892

myelination1892

spiral cleavage1892

medullation1893

myelinization1900

myelogenesis1901

induction1928

myelinogenesis1931

horizon1942

1889 Cent. Dict. Blastulation.

1931 J. Needham Chem. Embryol. II. iii. iv. 642 Vles concluded that blastulation involves a change of some kind in the metabolism of the embryo.

This entry has not yet been fully updated (first published 1933; most recently modified version published online September 2018).

单词	blastula
释义	blastulan. /ˈblastjʊlə/ Etymology: modern Latin, < Greek βλαστός sprout + diminutive suffix (see -ule suffix). Compare blastule n. Embryology. An embryo, typically composed of cells arranged in a sphere enclosing the blastocœle. ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > embryo or fetus > [noun] > blastula periblastula1876 macromere1877 micromere1877 blastula1887 amphiblastula1888 1887 A. C. Haddon Introd. Study Embryol. ii. 21 The result of segmentation is the formation of a multicellular body, usually enclosing a central cavity—‘Segmentation cavity’ or ‘Blastocœl’. The body itself is variously called ‘Blastula’ or ‘Blastosphere’. 1887 A. C. Haddon Introd. Study Embryol. ii. 50 Segmentation..of Sponges..results in the formation of a hollow blastula. 1893 J. Tuckey tr. B. Hatschek Amphioxus 43 An equal segmentation leading to a blastula without any well-defined main axis. 1924 E. W. MacBride Study of Heredity iii. 70 When the [sea-urchin's] egg has divided into about 1000 cells these form a little hollow balloon or vesicle known as the blastula. 1962 D. Nichols Echinoderms x. 120 The resulting blastula is oval, hollow and ciliated all over. Derivatives blastuˈlation n. the formation of the blastula. ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > embryo or fetus > embryo development processes > [noun] fetalization1819 segmentation1851 maceration1873 neurulation1878 blastulation1889 concrescence1890 cell lineage1892 myelination1892 spiral cleavage1892 medullation1893 myelinization1900 myelogenesis1901 induction1928 myelinogenesis1931 horizon1942 1889 Cent. Dict. Blastulation. 1931 J. Needham Chem. Embryol. II. iii. iv. 642 Vles concluded that blastulation involves a change of some kind in the metabolism of the embryo. This entry has not yet been fully updated (first published 1933; most recently modified version published online September 2018). < n.1887
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