2006-10-23 02:23:25 · 17 answers · asked by stupid d 1 in Science & Mathematics ➔ Biology
Fish do not have nostrils -- they have gills on the sides of their heads. The gills are rich in blood vessels that transfer oxygen from the water to the fish through osmosis.
2006-10-23 02:25:31 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Fish do have nostrils, but they use them to detect chemicals.
Fish breathe with their gills.
chemoreception [Smell and Taste]. Chemoreception is very well developed in the fishes, especially the sharks and eels which rely upon this to detect their prey. Fish have two nostrils on each side of their head, and there is no connection between the nostrils and the throat. The olfactory rosette is the organ that detects the chemicals. The size of the rosette is proportional to the fish's ability to smell. Some fish (such as sharks, rays, eels, and salmon) can detect chemical levels as low as 1 part per billion.
2006-10-23 02:26:04 · answer #2 · answered by DanE 7 · 2⤊ 0⤋
The nostrils of fish are used only for smelling. Unlike the nostrils of higher vertebrates, the nostrils of fish do not connect with the respiratory tract. They lead into small closed chambers lined with olfactory cells. In bony fishes the nostrils are lateral in position. In cartilagenous fishes they lie below the snout.
2006-10-23 06:47:16 · answer #3 · answered by PaulCyp 7 · 0⤊ 0⤋
Oxygen and carbon dioxide dissolve in water and most fishes exchange dissolved oxygen and carbon dioxide in water by means of the gills. The gills lie behind and to the side of the mouth cavity and consist of fleshy filaments supported by the gill arches and filled with blood vessels, which give gills a bright red colour. Water taken in continuously through the mouth passes backward between the gill bars and over the gill filaments, where the exchange of gases takes place. The gills are protected by a gill cover in teleosts and many other fishes, but by flaps of skin in sharks, rays, and some of the older fossil fish groups. The blood capillaries in the gill filaments are close to the gill surface to take up oxygen from the water and to give up excess carbon dioxide to the water.
2006-10-23 03:04:08 · answer #4 · answered by Britannica Knowledge 3 · 0⤊ 0⤋
They use gills, not nostrils, and breathe from the air bubbles in the water.
2006-10-23 02:26:11 · answer #5 · answered by Anonymous · 0⤊ 0⤋
*Fish do not breathe through their noses.
Paired nostrils, or nares, in fish are used to detect odors in water and can be quite sensitive. Eels and catfish have particularly well developed senses of smell.
I hope this is the right answer to ur question!!
2006-10-25 19:01:46 · answer #6 · answered by ? 6 · 0⤊ 0⤋
Fish Breathe Through
2017-01-17 03:45:33 · answer #7 · answered by Anonymous · 0⤊ 0⤋
No eyeballs for sure - Nostrils - Nope - fishes dont smell and hunt
2016-05-22 00:55:00 · answer #8 · answered by Anonymous · 0⤊ 0⤋
No through their gills on the side of their head.
2006-10-23 02:25:06 · answer #9 · answered by MOVING 5 · 0⤊ 0⤋
no water is extracted thru their gills and produces oxygen for the fish to survive
2006-10-23 02:26:01 · answer #10 · answered by rives 6 · 0⤊ 0⤋