Gill

A gill () is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are kept moist. The microscopic structure of a gill presents a large surface area to the external environment. Branchia (: branchiae) is the zoologists' name for gills (from Ancient Greek ).

With the exception of some aquatic insects, the filaments and lamellae (folds) contain blood or coelomic fluid, from which gases are exchanged through the thin walls. The blood carries oxygen to other parts of the body. Carbon dioxide passes from the blood through the thin gill tissue into the water. 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. Semiterrestrial marine animals such as crabs and mudskippers have gill chambers in which they store water, enabling them to use the dissolved oxygen when they are on land. Provided by Wikipedia

5
by Gill, Robin
Published 2017
Cambridge University Press

6
by Langley, Gill
Published 1989
Macmillan Education UK

7
by Garrett, Gill
Published 1990
Macmillan Education UK

9
by Gill, G.
Published 1974
Springer Netherlands

10
by Gill, Conrad
Published 1913
University Press

11
by Gill, Thomas
Published 1822
T. Cadell

13
by Gill, John
Published 1763
printed for the author; and sold by George Keith, at the Bible and Crown in Grace-Church-Street

14
by Gill, John
Published 1757
printed for the author; and sold by George Keith, at the Bible and Crown, in Grace-Church-Street; and by J. [ ohn ] Robinson, at Dock-Head, Southwark

16
by Gill, John
Published 1769
London: printed. Boston: re-printed for, and sold by Philip Freeman, at his shop in Union-Street

18
by Gill, John
Published 1750
s.n

19
by Gill, John
Published 1754
printed and sold by G. Keith at the Bible and Crown in Grace-Church-Street; and J. Robinson at the Globe, Dock-Head, Southwark