Tunica-Corpus model of the apical meristem (growing tip). The epidermal (L1) and subepidermal (L2) layers form the outer layers called the tunica. The inner L3 layer is called the corpus.
tunica
Any layer of tissue or membrane that encloses a structure or organ in either an animal or plant.
turbellarian
any aquatic free-swimming platyhelminth of the class Turbellaria, the body of which is covered with cilia.
Tunica vaginalis.
FIG. 1143- The scrotum. On the left side the cavity of the tunica vaginalis has been opened; on the right side only the layers superficial to the Cremaster have been removed. (Testut.) (See enlarged image) ...
Tunicata
Cephalochordata
The Origin and Evolution of Animals (Metazoa) ...
Tunica-Corpus model of the apical meristem (growing tip) ... Specifically, an active apical meristem lays down a growing root or shoot behind ...
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tunicates Chordates that show the three basic chordate characteristics only in the larva.
See: tunica.
coverings of spermatic cord, coverings of the spermatic cord, including external and internal spermatic fasciae, and cremasteric muscle and fascia.
Synonym: tunicae funiculi spermatici.
Urochordates are the tunicates. The tunicates are sessile animals that are filter feeders. They look like a small pouch, are often transparent or translucent and have no head.
When they are disturbed, tunicates tend to squirt water out. Water passes into a pharynx and out numerous gill slits, the only chordate characteristic that remains in adults.
Botryllus schlosseri: A clonal hermaphrodite (Phylum Chordata, Subphylum Tunicata, Class Ascidian=sea squirts). It grows fast, reproduces weekly, and thus, a good model for genetic studies of protochordates.
A group of planktonic tunicates that secrete a gelatinous house, used to strain unsuitable particles (large particles are rejected).
sedentary -- Living in a fixed location, as with most plants, tunicates, sponges, etc. Contrast with motile.
sediment -- Any solid material that has settled out of a state of suspension in liquid.
Synonym: tunica serosa. 2) In embryology, the term is used to mean the most exterior extraembryonic membrane.
endostyle - a ciliated, mucus-secreting groove in the ventral surface of the pharnyx of non-vertebrate chordates (e.g, tunicates and lancelets); it aids in transporting food to the esophagus.
The Biology of Pelagic Tunicates.:
The Biology of Pelagic Tunicates.
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 See also: Organ, Trans, Human, Tissue, Class
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