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 Licks? Neptunes has additional vocals from American artists Kelis, Lil' Cease, and Snoop Dogg. "How Many Licks?" was praised by music critics after its release and in retrospective reviews; the Neptunes remix also received positive reviews. However, African-American studies professor Mark Anthony Neal criticized the song's treatment of black female sexuality. Commentators compared its content to Trinidadian-American rapper Nicki Minaj's 2014 single, "Anaconda". "How Many Licks?" peaked at number 75 on the "Billboard" Hot 100 chart and charted in several other countries, but was not as commercially successful as Lil' Kim's previous releases. The song's music video was directed by Francis