AEBI 211 Lecture Notes - Lecture 8: Sagittal Plane, Symmetry In Biology, Coronal Plane
Document Summary
Notes: sessile = fixed in one place; immobile, sedentary = inactive; little movement, substratum = solid surface. Animal body plans: number of germ layers, types of body cavities, organismal complexity, symmetry. Most metazoans i. e. turtles: cephalization = differentiation of a head region and the concentration of nervous tissues and sense organs in front area. Planes of symmetry: front plane = coronal plane; divides body into dorsal & ventral halves, sagittal plane = divides body to right & left, transverse plane = cross section; divides body into anterior & posterior halves. Eumetazoa multicellular animal with distinct germ layers: has true tissues (beyond cellular grade of organization) includes cnidaria + ctenophora but excludes porifera, all exhibit primary bilateral symmetry except. Cnidaria & ctenophora: radial or biradial symmetry, cell-tissue level of biological organization, diploblastic, blind gut. [ cnidaria ] sedentary or sessile: tube shaped, mouth surrounded by tentacles, can be attached to substratum by a.
