branchial crown (ANN: Polychaeta) A structure surrounding the terminal mouth composed of ciliated, bipinnate filaments functioning in suspension filter feeding and respiration; tentacular crown.
branchial glands 1. (ARTHRO: Crustacea) Masses of connective-tissue cells, lacking ducts, that surround the venous channels in branchiae. 2. (MOLL: Cephalopoda) Glands along the gill where they connect with the mantle; site of hemocyanin production.
branchial heart (MOLL: Cephalopoda) One of two hearts that pumps blood to the gills of squid.
branchial passage (MOLL: Bivalvia) A passage in gills that carries parts of the exhalant water system.
branchial plume (ANN: Polychaeta) In certain Sabellidae and Serpulidae, a structure around the terminal mouth comprised of semicircular lobes bearing a few to a series of grooved, ciliated filaments or radioles, each with a series of paired ciliated side branches or pinnules functioning in filter feeding and respiration.
branchial ray A gill ray.
branchial region (ARTHRO: Crustacea) In Decapoda, the lateral part posterior to the pterygostomial region, overlying the branchiae.
branchial siphon (MOLL) The incurrent siphon.
branchiate a. [Gr. branchia, gills] Having gills or branchiae.
branchicolous a. [Gr. branchia, gills; colere, to inhabit] Parasitizing gills.
branchiform a. [Gr. branchia, gills; forma, shape] Shaped like gills.
branchiocardiac a. [Gr. branchia, gills; kardia, heart] Pertaining to gills and heart.
branchiocardiac carina (ARTHRO: Crustacea) That part of a carapace dividing the branchial and cardiac region.
branchiocardiac groove (ARTHRO: Crustacea) In Decapoda, an oblique groove on each side of the carapace separating the branchial and cardiac regions.
branchiocardiac sinus (ARTHRO: Crustacea) One of several sinus channels that facilitates blood flow from the gills to the pericardial sinus and then to the heart.
branchiopallial a. [Gr. branchia, gills; L. pallium, mantle] (MOLL) Pertaining to the gill and mantle.
branchiopneustic a. [Gr. branchia, gills; pneustikos, of breathing] (ARTHRO: Insecta) Pertaining to a form of respiration in larvae where the spiracles are functionally replaced by gills.
branchiostegal area (ARTHRO: Crustacea) That part of a carapace extending laterally and ventrally over the branchiae.
branchiostegal spine (ARTHRO: Crustacea) In Decapoda, a spine on the carapace between the antennal and ptery-gostomial spines.
branchiostegite n. [Gr. branchia, gills; stegos, roof] (ARTHRO: Crustacea) Expanded dorsal and lateral branchial region of the carapace that covers the gills.
branchireme n. [Gr. branchia, gills; remus, oar] (BRACHIO) Any limb.
branchitellum n.; pl. branchitella [Gr. dim. branchia, gills; telos, end] (MOLL: Bivalvia) A point on the posterioventral shell margin of oysters at the aboral end of the gills near the palliobranchial fusion.
breakage plane or joint The site of autotomy in invertebrates.
breastbone n. [A.S. breost, front of the chest; ban, bony] 1. The sternum. 2. (ARTHRO: Insecta) In certain dipterous larvae, a horny ventral process behind the oral opening, representing the labium; anchor process; sternal spatula.
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