External gills usually contains muscle tissue, and may be moved by the animal as a free appendage, in order to stir up stagnant water. The stalk is lined by many thinly walled filaments (fimbriae), containing the majority of blood vessels used in gas exchange. Animals usually have one external gill originating on each gill arch (except the hyoid), which leads to there being three pairs of external gills in salamanders, and four in the gilled larvae of lungfish. External gills External gills are the gills of an animal, most typically an amphibian, that are exposed to the environment, rather than set inside
How Many Fucks How Many Fucks "How Many Fucks" (censored as "How Many F**ks") is a song recorded by American singer Erika Jayne for her upcoming second studio album. Released as the album's lead single, the song was first distributed digitally on April 19, 2016, accompanied by the simultaneous release of a music video. In the video, Jayne performed "seductive" dance moves and wore "risqué" costumes. The song was written by Justin Tranter and Myah Marie, while Adam "Gage" Bruce solely produced the track. Musically, the single is a pop-rap and EDM track that discusses living carefree and without doubt. After its release,