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planula

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WordNet (r) 3.0 (2006) (WordNet)

planula
n 1: the flat ciliated free-swimming larva of hydrozoan
coelenterates

The Collaborative International Dictionary of English v.0.48 (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]

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英文字典中文字典相关资料:

Planula - Risk of Rain 2 Wiki
The Planula is a boss item in Risk of Rain 2, dropped by the Grandparent Grandparent Aberrant Caretaker HP: 3625 (+1088 per level) Damage: 26 (+5 2 per level)
Planula - Wikipedia
A planula is the free-swimming, flattened, ciliated, bilaterally symmetric larval form of various cnidarian species and also in some species of Ctenophores, which are not related to cnidarians at all
Planula | Cnidarian Larvae, Polyp Development Embryonic Development . . .
Planula, free-swimming or crawling larval type common in many species of the phylum Cnidaria (e g , jellyfish, corals, and sea anemones) The planula body is more or less cylindrical or egg-shaped and bears numerous cilia (tiny hairlike projections), which are used for locomotion
Planula - an overview | ScienceDirect Topics
Planula Newly hatched planulae from the egg membrane have a length of 270–330 μm and are brownish to reddish in colour They lack zooxanthellae They aggregate in groups between the brood-carrying filaments; their great numbers give the central moutharm disc of the mature female its reddish colouration
Planula - A Sensory Voyage — The Marine Diaries
When reproducing sexually, corals release free-swimming planula larvae into the water column Both brooded and spawned planulae seemingly respond differently to environmental cues What I would like to do is explore the sensory voyage that coral planulae undertake, discussing the ways in which these mobile genetic units use a variety of
Cnidarian Larvae: True Planulae, Other-Than-Planulae, and Planulae That . . .
The planula is a ciliated lecithotrophic larva with epithelial ectoderm and endoderm, a gastric cavity, and an elongated body The review examines whether the larvae of various Cnidaria fit this description and explores which larval form is ancestral for different cnidarian taxa
Planula | definition of planula by Medical dictionary
The planula larva of Pocillopora damicomis: lunar periodicity of swarming and substratum selection behavior
Planula - (Marine Biology) - Vocab, Definition, Explanations - Fiveable
A planula is a free-swimming larval stage of cnidarians, such as jellyfish, corals, and sea anemones This early life stage is typically characterized by a flattened, oval shape and covered in cilia, which help it swim in the water column
The planula stage of Aurelia - University of California, Merced
The planula stage of Aurelia Individual planula, less than 1 mm diameter, can be seen near the bottom edge of the photograph In this species, the planulae are first brooded in the oral arms of the female medusa (see photo)

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