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Phyla help biologists understand evolutionary relationships. Organisms in the same phylum—say, a human and a fish—might look very different, but they share a basic body blueprint (in this case, belonging to Chordata ). Phylum Chordata | manoa.hawaii.edu/ExploringOurFluidEarth
Each phylum represents a specific evolutionary path, defined by unique characteristics like internal structure, body symmetry, and mode of development. phylum
After Kingdom, it is the primary division of organisms sharing core structural traits. Phyla help biologists understand evolutionary relationships
Animals with jointed legs and exoskeletons (insects, spiders, crustaceans—the largest phylum). After Kingdom, it is the primary division of
Animals with a backbone (or notochord), including humans, fish, and birds.
Situated just below and above Class in biological classification, a phylum groups organisms based on a general, shared body plan or fundamental developmental structure. What is a Phylum?
There are over 30 animal phyla, but these are some of the most common and distinct: