gills are usually lamellar or filamentous appendages, through which the blood circulates, and in which it is exposed to the action of the air contained in the water.
Gills
Gills greatly increase the surface area for gas exchange. They occur in a variety of animal groups including arthropods (including some terrestrial crustaceans), annelids, fish, and amphibians.
gills - the organ for breathing of most animals that live in the water (Webster)
girdle - to encircle; twig girdlers remove a ring of bark and conductive tissue causing death of the distal portion of the twig ...
The gills of marine fish have cells that can remove salt from the body by pumping it into the salt water.
The thyroid gland cells bring in iodine for use in producing hormones.
Cells in the vertebrate kidney reabsorb sodium ions from urine.
gills
and the tissues.
All exchanges between blood and cells occur in the capillaries.
The force of the pump that pushes blood through the arteries is dissipated as the blood flows through capillaries.
mushroom gills
A tissue of radiating strips found on the lower surface of the mushroom cap.
mycelium
The densely branched network of hyphae in a fungus.
pertaining to gills
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby
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Many fish already had gills and swim bladders, so when some of them began moving between ponds, the swim bladder (a gas retention structure helping buoyancy in the fish) began to act as a gas exchange surface, ...
Examination of the embryos of land mammals has shown that they have branchial grooves ("gills") in the neck region and gill pouches on the interior.
Assume that only 1,000 of these lakes and ponds contain bluegills. Assuming that each lake constitutes a population, an investigator would have to perform 499,500 separate crosses to determine whether the populations could interbreed.
The gills actively uptake salt from the environment. Water will diffuse into the fish so it excretes a very hypotonic urine to expel all the excess water.
By drinking in sea water, and actively excreting salt out from the gills, the fish will gain salt as it produces an isotonic urine.
gill arch A supporting structure of fish gills.
gill arches Bony or cartilaginous gill supports of some vertebrates; also called visceral arches.
gill cover (or operculum)The flap of bony plates that covers the gills of bony fishes.
The opposite flow of adjacent fluids that maximizes transfer rates; for example, blood in the gills flows in the opposite direction in which water passes over the gills, maximizing oxygen uptake and carbon dioxide loss.
coupled reactions ...
Fish have gills while mammals, birds, and reptiles have lungs. Your respiratory system is made of your nose and mouth, a tube called the pharynx, another tube called the trachea, and your lungs.
In fishes these arches persist and give off branches to the gills, in which the blood is oxygenated. In mammals some of them remain as permanent structures while others disappear or become obliterated (Fig. 473).
20 ...
Among other tasks, cilia also generate water currents to carry food and oxygen past the gills of clams and transport food through the digestive systems of snails.
gill slit -- A slitlike or porelike opening connecting the pharynx of a chordate with the outside of the body. Gill slits may contain the gills and be used for gas exchange, as in most fish, but may also be used for filter-feeding, ...
In lower vertebrates, blood vessels formed here become part of the gills; in higher vertebrates derivatives include portions of the jaw and middle ear. Also known as branchial arches, gill arches, or visceral arches.
Gillnet: A net set upright in the water to catch fish by entangling their gills in its mesh.
 See also: Organ, Animal, Animals, Trans, Blood
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