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gill pouches in a sentence

1. Newly hatched tadpoles soon develop gill pouches that cover the gills.

2. Lungs originated as an extra pair of pouches in the throat, behind the gill pouches.

3. A hagfish generally respires by taking in water through its pharynx, past the velar chamber, and bringing the water through the internal gill pouches, which can vary in number from five to 16 pairs, depending on species.

4. The gill pouches open individually, but in Myxine, the openings have coalesced, with canals running backwards from each opening under the skin, uniting to form a common aperture on the ventral side known as the branchial opening.

5. The unidirectional water flow passing the gills is produced by rolling and unrolling velar folds located inside a chamber developed from the nasohypophyseal tract, and is operated by a complex set of muscles inserting into cartilages of the neurocranium, assisted by peristaltic contractions of the gill pouches and their ducts.

6. and seven or more paired gill pouches.

7. The head has five or six gill pouches with hemibranchs.

8. Further criticism was drawn towards the identification of the blocks of the body variously as gill pouches and muscle blocks (myomeres), despite the lack of differentiation in the structure of these blocks.

9. Meanwhile, the gill pouches of lampreys are paired extensions rather than segmented structures, and are usually embedded in a complex gill skeleton, neither of which is the case in Tullimonstrum.

10. the gill pouches would have further obstructed the flow of water.

11. Løvtrup (1977) argued that lampreys are more closely related to gnathostomes based on a number of uniquely derived characters, including: In other words, the cyclostome characteristics (e.g. horny teeth on a "tongue", gill pouches) are either instances of convergent evolution for feeding and gill ventilation in animals with an eel-like body shape, or represent primitive craniate characteristics subsequently lost or modified in gnathostomes.

12. Ostracoderms had separate pharyngeal gill pouches along the side of the head, which were permanently open with no protective operculum.

13. It has seven pairs of gill pouches and forming a line down both the lower sides of its body are pores which often many of them are ringed with a white colour and are used for secreting a snot-like slime which expands out once it has contact with the sea water.

14. At the pharyngula stage, all vertebrate embryos show remarkable similarities, i.e., it is a "phylotypic stage" of the sub-phylum, containing the following features: The branchial grooves are matched on the inside by a series of paired gill pouches.

15. Endeiolepis is an extinct jawless fish that lived during the Late Devonian period, similar to that of living lampreys for its gill pouches, but Endeiolepis had an unusually large number of gill pouches.

16. This is an adaptation to how the adults feed, by preventing the prey's body fluids from escaping through the gills or interfering with gas exchange, which takes place by pumping water in and out of the gill pouches instead of taking it in through the mouth.

17. The exceedingly well-preserved fossil showed a well-developed sucking oral disk, a relatively long branchial apparatus showing a branchial basket, seven gill pouches, gill arches, and even the impressions of gill filaments, and about 80 myomeres of its musculature.

18. It has six pairs of gill pouches and gill apertures.

19. The front body was flattened horizontally, oval-shaped, likely bearing a reticulated or anastomosing pattern, and had 5 evenly-spaced gill pouches along the midline.

20. Like other vetulicolians, the midline had 5 more or less evenly spaced openings, 3.3 mm (0.13 in) from the front edge and 2.4 mm (0.094 in) from the back edge, corresponding to gill pouches.

21. They had up to eight separate pharyngeal gill pouches along the side of the head, which were permanently open with no protective operculum.

22. As with other cyathaspidiforms, individuals of Anglaspis had dorsal and ventral plates covering the forebody, gill pouches, and nasal openings that lay on the roof of the oral cavity.

23. It is a parasite of the gill pouches of two species of hagfish found in Japanese waters, Eptatretus okinoseanus and Myxine garmani.

24. The animal's exquisitely preserved fossils show a creature very similar to modern-day lampreys, having a well-developed sucking oral disk, a branchial basket, at least seven pairs of gill pouches and corresponding gill arches, impressions of gill filaments, and at least 80 myomeres of its musculature.

25. The results indicate that there are seven pairs of gill pouches in Lampetra japonica (Martens). The wall of gill pouch folding inward forms gill-lobes and secondary gill lobe.