Nuchal organ — The Nuchal organ (no). Source: doi:10.1007/s004350000022 The nuchal organ is a ciliated pit[1] or groove present at the posterior end of the prostomium of annelid worms … Wikipedia
nuchal organ — (s). 1. (ANNELIDA: Polychaeta) A pair of ciliated sensory pits or slits in the head region. 2. (ARTHROPODA: Crustacea) In Branchiopoda, a sensory organ on the upper side of the cephalon. 3. (SIPUNCULA) Ciliated epidermal cells at the middorsal… … Dictionary of invertebrate zoology
nuchal caruncle — (ANNELIDA) A sensory organ on the prostomium, or extending posteriorly in the form of a ciliated ridge or groove … Dictionary of invertebrate zoology
neck organ — See: nuchal organ [Martin, 2005]. See: nuchal organ [McLaughlin, 1980]. (Order Cladocera): Nuchal organ [Stachowitsch, 1992] … Crustacea glossary
dorsal organ — Poorly understood glandular sensory structures (actually several different structures that may or may not be homologous) on the head of many crustaceans [Brusca and Brusca, 2002]. Thickened glandular area of hypoderm of dorsal surface just behind … Crustacea glossary
neck organ — see nuchal organ … Dictionary of invertebrate zoology
frontal organ(s) — Sensory cells on anterior surface of cephalon. (Syn. haft organ, frontal eye) [McLaughlin, 1980]. Sensory cells or setae on front surface of heads on some branchiopods, copepods, and decapods [Moore and McCormick, 1969]. (Order Cladocera):… … Crustacea glossary
Prostomium — (sometimes also called acron) is the first body segment in annelids worms. It is in front of (but does not include) the mouth, being usually a small shelf or lip like extension over the dorsal side of the mouth. It sometimes bears antennae and… … Wikipedia
Muscle — is the tissue of the body which primarily functions as a source of power. There are three types of muscle in the body. Muscle which is responsible for moving extremities and external areas of the body is called "skeletal muscle." Heart… … Medical dictionary
Bone — This article is about the skeletal organ. For other uses, see Bone (disambiguation) and Bones (disambiguation). For the tissue, see Osseous tissue. Drawing of a human femur Bones are rigid organs that constitute part of the endoskeleton of… … Wikipedia
