WebA wave of contraction of longitudinal muscles follows, and the cycle is repeated. The setae of a segment are extended by certain body muscles to prevent backward movement of … Webannelid, phylum name Annelida, also called segmented worm, any member of a phylum of invertebrate animals that are characterized by the possession of a body cavity (or coelom ), movable bristles (or setae ), and a body …
Earth Worm Lab test Flashcards
Web(1) A block of tissue bounded by the ostium of the coronary sinus, the pars membranacea, the septal leaflet of the tricuspid valve and the atrial and ventricular septa is removed. (2) … Web13 Jan 2024 · As the worm wriggles behind, the slime tube and cocoon are slipped forward over the head. In this way, the cocoon receives ova from female genital apertures and sperms of other worms, from spermathecae, so that cross-fertilization is ensured, and zygotes are formed. summer decorative house flags
Septa definition and meaning Collins English Dictionary
Websepta a wall or divider digestive tract divided into regions: pharnyx, stomach, intestine respiratory skin breathing as in earthworms, skin most be moist for diffusion, specialized structure for gas exchange, gills are present in some marine worms such as feather dusters first to have... gills and vessels circulatory Web23 Apr 2009 · , septa, or dividing walls, are located between the segments. External segments are called metameres. There may be more than 100 segments in an adult … Web20 Jan 2024 · Anatomy of Segmented Worms . Segmented worms are bilaterally symmetrical. Their body consists of a head region, a tail region, and a middle region of numerous repeated segments. Each segment is separate from the others by a structure called septa. Each segment contains a complete set of organs. paladin amy sonic