| slovo | definícia |
gastrula
(encz) | gastrula, n: |
Gastrula
(gcide) | Gastrula \Gas"tru*la\, n.; pl. Gastrul[ae][NL., dim. fr. Gr. ?
the stomach.] (Biol.)
An embryonic form having its origin in the invagination or
pushing in of the wall of the planula or blastula (the
blastosphere) on one side, thus giving rise to a
double-walled sac, with one opening or mouth (the blastopore)
which leads into the cavity (the archenteron) lined by the
inner wall (the hypoblast). See Illust. under Invagination.
In a more general sense, an ideal stage in embryonic
development. See Gastr[ae]a. -- a. Of or pertaining to a
gastrula.
[1913 Webster] |
gastrula
(gcide) | Planula \Plan"u*la\, n.; pl. Planul[ae]. [L., a little plane.]
1. (Biol.) In embryonic development, a vesicle filled with
fluid, formed from the morula by the divergence of its
cells in such a manner as to give rise to a central space,
around which the cells arrange themselves as an envelope;
an embryonic form intermediate between the morula and
gastrula. Sometimes used as synonymous with gastrula.
[1913 Webster]
2. (Zool.) The very young, free-swimming larva of the
c[oe]lenterates. It usually has a flattened oval or oblong
form, and is entirely covered with cilia.
[1913 Webster] |
Gastrula
(gcide) | Stomapoda \Sto*map"o*da\, n. pl. [NL. See Stoma, and -poda.]
(Zool.)
An order of Crustacea including the squillas. The maxillipeds
are leglike in form, and the large claws are comblike. They
have a large and elongated abdomen, which contains a part of
the stomach and heart; the abdominal appendages are large,
and bear the gills. Called also Gastrula, Stomatopoda,
and Squilloidea.
[1913 Webster] |
gastrula
(wn) | gastrula
n 1: double-walled stage of the embryo resulting from
invagination of the blastula; the outer layer of cells is
the ectoderm and the inner layer differentiates into the
mesoderm and endoderm |
| | podobné slovo | definícia |
gastrulation
(encz) | gastrulation, n: |
Gastrula
(gcide) | Gastrula \Gas"tru*la\, n.; pl. Gastrul[ae][NL., dim. fr. Gr. ?
the stomach.] (Biol.)
An embryonic form having its origin in the invagination or
pushing in of the wall of the planula or blastula (the
blastosphere) on one side, thus giving rise to a
double-walled sac, with one opening or mouth (the blastopore)
which leads into the cavity (the archenteron) lined by the
inner wall (the hypoblast). See Illust. under Invagination.
In a more general sense, an ideal stage in embryonic
development. See Gastr[ae]a. -- a. Of or pertaining to a
gastrula.
[1913 Webster]Planula \Plan"u*la\, n.; pl. Planul[ae]. [L., a little plane.]
1. (Biol.) In embryonic development, a vesicle filled with
fluid, formed from the morula by the divergence of its
cells in such a manner as to give rise to a central space,
around which the cells arrange themselves as an envelope;
an embryonic form intermediate between the morula and
gastrula. Sometimes used as synonymous with gastrula.
[1913 Webster]
2. (Zool.) The very young, free-swimming larva of the
c[oe]lenterates. It usually has a flattened oval or oblong
form, and is entirely covered with cilia.
[1913 Webster]Stomapoda \Sto*map"o*da\, n. pl. [NL. See Stoma, and -poda.]
(Zool.)
An order of Crustacea including the squillas. The maxillipeds
are leglike in form, and the large claws are comblike. They
have a large and elongated abdomen, which contains a part of
the stomach and heart; the abdominal appendages are large,
and bear the gills. Called also Gastrula, Stomatopoda,
and Squilloidea.
[1913 Webster] |
Gastrula
(gcide) | Gastrula \Gas"tru*la\, n.; pl. Gastrul[ae][NL., dim. fr. Gr. ?
the stomach.] (Biol.)
An embryonic form having its origin in the invagination or
pushing in of the wall of the planula or blastula (the
blastosphere) on one side, thus giving rise to a
double-walled sac, with one opening or mouth (the blastopore)
which leads into the cavity (the archenteron) lined by the
inner wall (the hypoblast). See Illust. under Invagination.
In a more general sense, an ideal stage in embryonic
development. See Gastr[ae]a. -- a. Of or pertaining to a
gastrula.
[1913 Webster]Planula \Plan"u*la\, n.; pl. Planul[ae]. [L., a little plane.]
1. (Biol.) In embryonic development, a vesicle filled with
fluid, formed from the morula by the divergence of its
cells in such a manner as to give rise to a central space,
around which the cells arrange themselves as an envelope;
an embryonic form intermediate between the morula and
gastrula. Sometimes used as synonymous with gastrula.
[1913 Webster]
2. (Zool.) The very young, free-swimming larva of the
c[oe]lenterates. It usually has a flattened oval or oblong
form, and is entirely covered with cilia.
[1913 Webster]Stomapoda \Sto*map"o*da\, n. pl. [NL. See Stoma, and -poda.]
(Zool.)
An order of Crustacea including the squillas. The maxillipeds
are leglike in form, and the large claws are comblike. They
have a large and elongated abdomen, which contains a part of
the stomach and heart; the abdominal appendages are large,
and bear the gills. Called also Gastrula, Stomatopoda,
and Squilloidea.
[1913 Webster] |
Gastrulae
(gcide) | Gastrula \Gas"tru*la\, n.; pl. Gastrul[ae][NL., dim. fr. Gr. ?
the stomach.] (Biol.)
An embryonic form having its origin in the invagination or
pushing in of the wall of the planula or blastula (the
blastosphere) on one side, thus giving rise to a
double-walled sac, with one opening or mouth (the blastopore)
which leads into the cavity (the archenteron) lined by the
inner wall (the hypoblast). See Illust. under Invagination.
In a more general sense, an ideal stage in embryonic
development. See Gastr[ae]a. -- a. Of or pertaining to a
gastrula.
[1913 Webster] |
Gastrulation
(gcide) | Gastrulation \Gas`tru*la"tion\ (g[a^]s`tr[.u]*l[=a]"sh[u^]n), n.
(Biol.)
The process of invagination, in embryonic development, by
which a gastrula is formed.
[1913 Webster] |
gastrulation
(wn) | gastrulation
n 1: the process in which a gastrula develops from a blastula by
the inward migration of cells |
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