Examlex
During the early 1920s,which organization controlled every elective office in Dallas and showed considerable political power statewide?
Cnidarians
A phylum of animals that are more complex than sponges, characterized by their radial symmetry, a central gastrovascular cavity, and the presence of cnidocytes; includes jellyfish, corals, and sea anemones.
Spiracles
External respiratory openings found in some animals, such as insects and some amphibians, that allow air to enter and exit the trachea.
Tracheae
Tubes in the respiratory system that conduct air to and from the lungs.
Book Lungs
Respiratory organs found in certain arachnids, such as spiders and scorpions, consisting of stacked leaf-like structures used for gas exchange.
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