Examlex
The external and internal intercostals are the prime movers of respiration.
Asexual Fragmentation
A method of asexual reproduction where an organism breaks into fragments, each of which develops into a new organism.
Bilateral Symmetry
A body plan in which there are two symmetrical halves of the body, with a distinct left and right, matching one another.
Radial Symmetry
A body plan in which body parts are arranged around a central axis, characteristic of many invertebrates like jellyfish and sea urchins.
Deuterostomes
A major group of animals in which the anus develops from the first opening in the embryo, with humans and starfish as examples.
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