how are the gills of a fish adapted for efficient gas exchange?
250950
Fish use specialised surfaces called gills to carry out gas exchange. Gills are highly folded, giving them a large surface area and maximising the efficiency of gas exchange. ... The water that passes over the gill lamellae flows in the opposite direction to the blood within the gill lamellae.
787035
In water, the projections on the gills float, so each is surrounded with water from which it can absorb oxygen. On land, these all collapse together, blocking most of the surface area. So they don't work well and the fish suffocates. Lungs increase surface area by having many tiny pockets, which don't collapse in air.
1261605
Fish swim by moving their tail from side to side. Marine mammals swim by moving their tail up and down. Fish have gills so they can breathe underwater. Marine mammals do not have gills.
529413
Gills are the organ present in fishes to breathe in water they are located back side of eyes .
1447751
As far as I know, all fish do have gills. However, not all fish can breathe through their gills. Lungfish for example live in freshwater habitats and have evolved lungs which they use to breathe air.
155951
Sometimes more than a quarter of the oxygen they use is absorbed directly through their skin. Tadpoles and some aquatic amphibians have gills like fish that they use to breathe. There are a few amphibians that do not have lungs and only breathe through their skin.
1284246
All the respiratory organs have a large surface area to get enough oxygen. All the respiratory organs have thin walls for easy diffusion and exchange of respiratory gases. All the respiratory organs like skin, lungs and gills have a rich blood supply for transporting gases.
1071504
Goldfish, like other fish, require oxygenated water to survive. If a goldfish outgrows his tank or there isn't enough water flow, he may not be getting the oxygen he needs to live a healthy and happy life. ... A goldfish in need of oxygen will repeatedly swim to the surface of the water and gulp for air.
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Fish need oxygen to survive. If your tank is loaded with toxic chemicals, like chlorine and ammonia, the fish get their own oxygen by floating to the surface and blowing bubbles. This is a sign that your fish are in danger. ... A fish tank air pump creates bubbles that remove undesirable gases from the water.
552056
Locate the gills, which are featherlike structures found underneath the carapace and attached to the chelipeds and walking legs. A constant flow of blood to the gills releases carbon dioxide and picks up oxygen. The feathery nature of the gills gives them a very large surface area.
1076164
listen)) is a respiratory organ found in many aquatic organisms that extracts dissolved oxygen from water and excretes carbon dioxide. ... Gills or gill-like organs, located in different parts of the body, are found in various groups of aquatic animals, including mollusks, crustaceans, insects, fish, and amphibians.
970011
The main difference between gills and lungs is that gills are the type of respiratory organs specialized to breathe in water, whereas lungs are the type of respiratory organs specialized to breathe in the air. Furthermore, fish use gills while mostly tetrapods use lungs.
1303128
In all species, the lungs were extremely effective in oxygen uptake whilst the performance of the gills was inferior. An exception to this was Gecarcoidea natalis, which has gills highly modified for aerial gas exchange; its gills and lungs were equally efficient in O2 uptake.
286948
Fish do not have lungs. In order to be classified as a fish, the animal in question must use gills instead of lungs. Water flows over the gills and...
1306119
KEY POINT - Leaves, roots, gills and lungs all have high surface area to volume properties so that supplies of substances vital to all the living cells are made available by these structures. Movement of substances to and from these structures is carried out by efficient mass transport systems.
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Gills are very efficient at removing oxygen from water: there is only 1/20 the amount of oxygen present in water as in the same volume of air. Water flows over gills in one direction while blood flows in the opposite direction through gill capillaries. This countercurrent flow maximizes oxygen transfer.
158830
The concentration of oxygen in water is lower than air and it diffuses more slowly. ... Rather than using lungs "Gaseous exchange takes place across the surface of highly vascularised gills over which a one-way current of water is kept flowing by a specialised pumping mechanism.