This is known as a long vowel sound, because it says the ânameâ of the letter. The same goes for the other vowels. A short vowel sound is a vowel sound that does not follow this rule. When reading a word that uses a short vowel sound, will say the sound that the letter can make that is not its actual name. So in the case of âA,â the word âmainâ might have a long âAâ sound because we pronounce the âAâ as /Ä/, whereas the word âmanâ has a short vowel sound.
Gill arches supporting the gills in a pike. Branchial arches, or gill arches, are a series of bony loops present in fish, which support the gills. As gills are the primitive condition of vertebrates, all vertebrate embryos develop pharyngeal arches, though the eventual fate of these arches varies between taxa.
The total area is the number of lamellae times the surface area of each lamella. One important aspect is that not all the gill filaments are exposed to water at rest, which minimizes the problems the fish have with osmotic differences between the blood (body) and the water.ach gill arch havs a skeletal component that is important for holding the gill filaments, As you can see in the figure, the blood vessels coming from the heart (in blue) and going to the body (in red) runs through the gill arch.