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References A adhesive organ 1. An organ present at the anterior end of ascidian larvae, serving to attach the larva to the substrate during its metamorphosis. It is usually made of three papillae. 2. The individual papillae. atrium atrial pore atrial siphon Also excurrent siphon or exhalant siphon. Opening through which water exits the branchial basket in ascidians. B blastozooid Sexual ...
Clavelina moluccensis, the bluebell tunicate Botrylloides violaceus showing oral tentacles at openings of buccal siphons. About 3,000 species of tunicate exist in the world's oceans, living mostly in shallow water. The most numerous group is the ascidians; fewer than 100 species of these are found at depths greater than 200 m (660 ft). [12]
In human anatomy, it generally is applied in three contexts: the fibrous sheath of the corpora cavernosa penis, the fibrous tunic of the testis, and the connective tissue tunic around the ovaries. [6] Tunica dartos is a muscular tunic beneath the skin of the scrotum. It is one of the mechanisms for retraction of the testes, largely for ...
Tunicata stubs (216 P) Pages in category "Tunicates" The following 5 pages are in this category, out of 5 total. ... Tunicate * Glossary of tunicate anatomy ...
The Doliolida are an order of small marine chordates of the subphylum Tunicata.They are in the class Thaliacea, which also includes the salps and pyrosomes. [1] [2] The doliolid body is small, typically 1–2 mm long, and barrel-shaped; it features two wide siphons, one at the front and the other at the back end, and eight or nine circular muscle strands reminiscent of barrel bands.
Ciona intestinalis (sometimes known by the common name of vase tunicate) is an ascidian (sea squirt), a tunicate with very soft tunic. Its Latin name literally means "pillar of intestines", referring to the fact that its body is a soft, translucent column-like structure, resembling a mass of intestines sprouting from a rock. [ 1 ]
Fritillaria differs from other larvaceans like the well-studied Oikopleura by having an elongated trunk region, divided into three distinct sections.. Only the anterior section, comprising the mouth, pharynx and cerebral ganglion, is covered in oikoplastic epithelium. [2]
The full development of Oikopleura dioica and the fate of its cell lineages have been well-documented, providing insight into larvacean anatomy. [11] Being a model organism, most of our knowledge on larvaceans comes from this specific taxon. Variations in body shape and anatomy exist between families, [12] although the general body plan stays ...