Gill slits are individual openings to gills, i.e., multiple gill arches, which lack a single outer cover. Such gills are characteristic of cartilaginous...
3 KB (402 words) - 15:09, 17 August 2024
vertebrates typically develop in the walls of the pharynx, along a series of gill slits opening to the exterior. Most species employ a counter-current exchange...
21 KB (2,529 words) - 17:10, 13 April 2024
pharyngeal slits. It is postulated that this is how pharyngeal slits first assisted in filter-feeding, and later, with the addition of gills along their...
9 KB (1,096 words) - 09:38, 3 July 2024
delicate gills. A smaller opening, the spiracle, lies in the back of the first gill slit. This bears a small pseudobranch that resembles a gill in structure...
21 KB (2,659 words) - 19:14, 14 August 2024
slot-like body openings called gill slits that lead from the gills, but the Hexatrygonidae have six. Batoid gill slits lie under the pectoral fins on...
25 KB (2,183 words) - 16:53, 20 August 2024
to the environment, rather than set inside the pharynx and covered by gill slits, as they are in most fishes. Instead, the respiratory organs are set on...
2 KB (282 words) - 22:34, 13 September 2020
Operculum (fish) (redirect from Gill cover)
through a series of gill slits that perforate the body wall. Without the operculum bone, other methods of getting water to the gills are required, such...
5 KB (596 words) - 21:22, 31 May 2024
Branchial arch (redirect from Gill arch)
vertebrates breathe with gills, which are carried right behind the head, bordering the posterior margins of a series of openings (gill slits) from the pharynx...
8 KB (1,040 words) - 15:09, 10 August 2024
potentially damaging passage of solid material through the gill slits and over the gill filaments, early gill rakers strained large particles from the water and...
3 KB (333 words) - 10:25, 17 May 2024
circulatory system 8 = atriopore 9 = space above pharynx 10 = pharyngeal slit (gill) 11 = pharynx 12 = vestibule 13 = oral cirri 14 = mouth opening 15 = gonads...
55 KB (5,168 words) - 13:54, 31 August 2024
about twice the head length. In general, three external gills are inserted posterior to the gill slits and above the pectoral fins. It has cycloid scales embedded...
39 KB (3,346 words) - 17:26, 24 August 2024
elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the...
143 KB (14,295 words) - 15:14, 3 September 2024
Amphibious fish (section Gill or skin breathers)
fish and many fish in oxygen-poor water use other methods, such as their gills or their skin to breathe air. Amphibious fish may also have eyes adapted...
9 KB (1,113 words) - 13:37, 24 May 2024
evolution of the jaw in the early jawed vertebrates, this gill slit was caught between the forward gill-rod (now functioning as the jaw) and the next rod, the...
8 KB (907 words) - 16:04, 26 August 2024
Shark anatomy (section Gill structure and components)
chordate to move in water. The endostyle is underneath the pharyngeal gill slits where proteins are trapped to eventually provide the chordate energy and...
33 KB (4,260 words) - 14:14, 7 August 2024
Cleithrum Chromatophore Fins dorsal fin Gill branchial arch gill raker gill slit pharyngeal arch pharyngeal slit pseudobranch Glossohyal Jaw hyomandibula...
26 KB (1,988 words) - 02:20, 9 April 2024
through the inhalant buccal siphon by the action of cilia lining the gill slits. The filtered water is then expelled through a separate exhalant siphon...
28 KB (3,342 words) - 01:16, 12 August 2024
vertebrates typically develop in the walls of the pharynx, along a series of gill slits opening to the exterior. Most species employ a countercurrent exchange...
79 KB (9,832 words) - 06:29, 3 September 2024
limbs. They also evolved a pair of opercula (gill covers), which can actively draw water across the gills so they can breathe without having to swim. Bony...
32 KB (2,186 words) - 21:02, 24 August 2024
Hexanchidae. It is recognizable because of its seven gill slits, while most shark species have five gill slits, with the exception of the members of the order...
28 KB (3,046 words) - 21:05, 22 August 2024
increase surface area for gas exchange. Four-gill slits lined with gill rakers are hidden underneath the external gills, which prevent food from entering and...
56 KB (6,185 words) - 14:56, 22 August 2024
superficially similar to those of lobe-finned fishes. They also have a pair of slit-like spiracles on the top of their heads that are used to breathe air, two...
15 KB (1,303 words) - 12:21, 5 June 2024
psammophilus has just a single gill slit. The gills in some acorn worms have cartilaginous support structures. Each slit consists of a branchial chamber...
22 KB (2,517 words) - 05:25, 22 July 2024
with gill remnants still present, short lived and only leaves behind a gill slit. For species with scales under their skin, the scales does not form before...
161 KB (18,019 words) - 06:12, 28 August 2024
Cleithrum Chromatophore Fins dorsal fin Gill branchial arch gill raker gill slit pharyngeal arch pharyngeal slit pseudobranch Glossohyal Jaw hyomandibula...
20 KB (2,058 words) - 03:25, 5 September 2024
bone is derived from the lower half of the second gill arch in fish, which separates the first gill slit from the spiracle, and is often called the hyoid...
18 KB (2,258 words) - 11:33, 21 June 2024
ventromedial valve of the gill slit, keeping the gills moist, and allowing them to function while exposed to air. Gill filaments are stiff and do not...
22 KB (2,496 words) - 18:12, 15 August 2024
family, the Hexanchidae, characterized by an additional pair or pairs of gill slits. Its 37 species are placed within the 10 genera: Gladioserratus, Heptranchias...
8 KB (743 words) - 21:36, 22 August 2024
fish's importance with a famous cable: "Most Important Preserve Skeleton and Gills = Fish Described." Its discovery 66 million years after its supposed extinction...
72 KB (6,339 words) - 04:49, 4 September 2024