are echinoderms radial or bilateral?
320184
Echinoderms evolved from animals with bilateral symmetry. Although adult echinoderms possess pentaradial, or five-sided, symmetry, echinoderm larvae are ciliated, free-swimming organisms that organize in bilateral symmetry which makes them look like embryonic chordates.
329530
The water vascular system of echinoderms is essentially a system of fluid-filled canals that extend along each of the body regions and have many external projections called tube feet. There are several functions of the system, one of which is to use water pressure to mediate movement and assist in feeding.
276673
['They are bilaterally symmetrical.', 'They are triploblastic, which three layers.', 'They show organ system grade of organisation.', 'The body is soft and unsegmented.', 'Body is divisible into three regions – head, a visceral mass, and ventral foot.', 'Body is covered by a mantle and shell.']
700651
['bilateral symmetry.', 'triploblastic embryo develops. ectoderm. endoderm. mesoderm.', 'protostome characteristics.', 'may be either coelomate or pseudocoelomate (depending on phylum)', 'true tissues, true organs and true organ systems: integumentary system. digestive system.']
92040
Flatworms are more complex than cnidarians. Cnidarians have two layers of cells, the ectoderm and the endoderm; flatworms have a middle layer called the mesoderm between the other two layers (Fig.
1093208
Echinoderms are also characterized by a unique water-based vascular system possessed by no other animal. This highly specialized system not only allows them to transport food and water along the outside of their bodies, but it also allows for other nutrients and gases to be transported as well.
1316519
One character inherited by all arthropods is bilateral symmetry. ... Other animals have symmetry like a snowflake s — there are many different ways to carve it into matching halves, and all of these lines meet in the middle, dividing it up like a birthday cake. That is called radial symmetry.
1377655
Regular echinoids have no front or back end and can move in any direction. Irregular echinoids have a definite front and back and do move in a particular direction. This is because regulars and irregulars have very different ways of life.
41382
Echinoderms are the most closely related phylum to the phylum Chordata, which includes many complex organisms such as humans. Their shared common ancestor was likely a bilaterally symmetrical organism with a cephalized (centralized in a head region) nervous system.
1287829
Like other echinoderms, crinoids possess a water vascular system that maintains hydraulic pressure in the tube feet. ... It is the contraction of the ring canal that extends the tube feet. Three narrow branches of the coelom enter each arm, two on the oral side and one aborally, and pinnules.
1410425
Animals with bilateral symmetry produce a third layer in-between called mesoderm, making them triploblastic. Germ layers will eventually give rise to all of an animal's tissues and organs through a process called organogenesis.
884325
Cnidaria and Ctenophora are two types of phyla composed of coelenterates. ... Both cnidarians and ctenophores are diploblastic animals. Cnidarians exhibit radial symmetry whereas ctenophores exhibit biradial symmetry. Both contain tentacles, surrounding their mouth.
1363101
Oblate spheroids have rotational symmetry around an axis from pole to pole. Many planets, including the Earth and Saturn, are oblate spheroids. The difference between a sphere and the Earth's shape is small, only about one part in 300. Stars spin, and some spin very fast.
795519
Echinoderms are monoecious, that means that the sexes are separate. Males are males, females are females. There is no ambiguity.
434199
First, they all possess five-part radial symmetry around a central disk. Second, they all possess a very unique water vascular system (vascular system based on water). These unique characteristics distinguish echinoderms from other animals in the animal kingdom.
109886
Dyads align at the spindle equator. Sister chromatids face opposite spindle poles. Synapsis and crossing-over occur, Tetrads are at spindle equator, Homologues separate, Haploid daughter nuclei are not genetically identical to parent cell.
104061
Most adult cnidarians appear as either free-swimming medusae or sessile polyps, and many hydrozoans species are known to alternate between the two forms. Both are radially symmetrical, like a wheel and a tube respectively.