Diversity Lab 2

eumetazoans

-unspecialized

-integumentary/cutaneous respiration

lopophore

-phoronids

-external gills

-filter feeding and do gas exchange

-specialized adaptation

-not a respiratory organ

gills

are respiratory organs found in many aquatic animals that facilitate the exchange of gases, primarily oxygen and carbon dioxide, between the organism and water.

mucus

-composed of glycosylated proteins

-structure has large surface area, absorbing water

goblet cells

-produces mucus

-abundant in interior surface of stomach and small intestine to protect lining of digestive tract

-fill with mucus, cannot be seen on a stain

mucous glands

-secrete mucus

-multicellular

biomodal

-frogs and other semiaquatic amphibians

-respire via integument and lungs

respiratory trees

-sea cucumbers (soft-bodied echinoderms)

-branches from a cloaca inside their anus

-water draws through the anus and into the tree before expelling the eater

-respire bimodally (integument and respiratory tree)