Like sponges and cnidarians, flatworms and roundworms get oxygen and get rid of carbon dioxide by

directly through their cuticle, which is permeable to both gases. Once oxygen has crossed into their bodies, it diffuses throughout the tissues.

directly through their cuticle, which is permeable to both gases. Once oxygen has crossed into their bodies, it diffuses throughout the tissues.

Explanation:

the first two-party system consisted of the federalist party, who supported the ratification of the constitution, and the democratic-republican party or the anti-administration party (anti-federalists), who opposed the powerful central government, among others, that the constitution established when it took effect in

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