bilateral symmetry (hence the name); that is, dorsal-ventral and left-right axes
triploblastic (three tissue layers: ectoderm, mesoderm, endoderm) ...
bilateral symmetry In animals, refers to those that have a single axis of symmetry.
biliary system The bile-producing system consisting of the liver, gallbladder, and associated ducts.
bilateral symmetry
[L. bi, twice, two + lateris, side; Gk. summetros, symmetry]
Characterizing a body form with a central longitudinal plane that divides the body into two equal but opposite halves.
bilateria ...
bilateral symmetry
An animal body structure in which the right and left halves of an organism are approximately mirror images of each other. Most higher invertebrates and all vertebrates have members which are bilaterally symmetrical.
bilateral symmetry, or two-sidedness, in vertebrates, etc, is that in which the body can be divided into symmetrical halves by a vertical plane passing through the middle; radial symmetry, as in echinoderms, ...
bilateral symmetry A form of symmetry in which only the midsagittal plane will divide an organism into mirror images; bilateral symmetry is characteristic of actively moving organisms that have definite anterior (head) and posterior (tail) ends.
They are the first animals with bilateral symmetry which is associated with active locomotion and a concentration of sense organs at the anterior end of the animal. They, and all more complex animals, form tissues, organs, and organ systems.
"[Bilateral symmetry of the dermatoglyphic characteristics in Down's syndrome]". Ontogenez 24 (3): 98-102. PMID 8355961.
^ Durham N, Koehler J.
What advantages would radial symmetry present as opposed to bilateral symmetry? What advantages would bilateral symmetry present as opposed to radial symmetry?
List some of the economic and environmental importance of members of phylum Cnidaria.
Nematodes are round and have bilateral symmetry (both halves look the same). They also have special muscles that move down the length of that entire round body.
the concentration of important nerve/sensory endings at the end of an animal with bilateral symmetry [i.e. the head]
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Irregular Flower a term referring to a flower which has bilateral symmetry‚ also known as a zygomorphic flower
(im‚ in‚ ir = in‚ not; regula = rule) ...
Bilateria - group containing all multicellular animals with bilateral symmetry.
 See also: Animal, Organ, Lateral, Human, Animals
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