The flea is a narrow insect compressed laterally with backwardly directed spines, which adapt it for moving between the hairs and feathers of mammals and birds.
(The flea; is; a narrow insect compressed laterally with backwardly directed spines,) (a narrow insect; compressed laterally; with backwardly directed spines) (backwardly directed spines; adapt; it; for moving between the hairs and feathers of mammals and birds)
The flea a narrow insect backwardly directed spines
is compressed laterally adapt
a narrow insect compressed laterally with backwardly directed spines,
with backwardly directed spines
it for moving between the hairs and feathers of mammals and birds