radial symmetry. A morphological condition in which the parts of an
animal are arranged concentrically around an oral-
aboral axis, and more than one imaginary plane through this axis yields halves that are mirror images of each other.
Full article >>>radial symmetry[L.
radius, a spoke of a wheel + Gk. summetros, symmetry]
Characterizing a body shaped like a pie or barrel, with many equal parts radiating outward like the spokes of a wheel; present in cnidarians and echinoderms.
Full article >>>radial symmetry. HOWEVER, their
larvae have
bilateral symmetry so the echinoderms probably evolved from bilaterally symmetrical ancestors and properly belong in the Bilateria.
water
vascular system.
Full article >>>Radiata (unranked) (
radial symmetry)
Ctenophora (comb jellies)
Cnidaria (coral, jellyfish, anemones)
Bilateria (unranked) (
bilateral symmetry) ...
Full article >>>The
Phylum Cnidaria contains 10,000
species characterized by adult bodies having
radial symmetry. Cnidarians are aquatic, mostly all marine. Cnidarians have only the
ectoderm and
endoderm tissue layers.
Full article >>>group of simple
animals with
radial symmetry, including the cnidarians (or coelenterates) and ctenophores.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
Full article >>>'"/>