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Siphuncle - Wikipedia
The siphuncle is a strand of tissue passing longitudinally through the shell of a cephalopod mollusc. Only cephalopods with chambered shells have siphuncles, ...
en.wikipedia.org
en.wikipedia.org
Siphuncle Controls Buoyancy — Biological Strategy - AskNature
The siphuncle of nautiloids controls buoyancy by active transport of ions and osmosis between the siphuncle and shell chamber.
asknature.org
asknature.org
SIPHUNCLE Definition & Meaning - Merriam-Webster
The meaning of SIPHUNCLE is a membranous tubular extension of the mantle which runs through the partitions of the chambers to the apex of a shelled ...
www.merriam-webster.com
www.merriam-webster.com
siphuncle
siphuncle Zool. (ˈsaɪfʌŋk(ə)l) [ad. L. sīphunculus, dim. of sīpho siphon.] 1. A small canal or tube traversing and connecting the shell-chambers in certain cephalopods; = siphunculus, and siphon n. 3 a.1822 J. Parkinson Outl. Oryctol. 161 The most important part of this organ, the continuous siphunc...
Oxford English Dictionary
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siphuncle - Wiktionary, the free dictionary
Noun · (zoology) A strand of tissue passing longitudinally through the shell of a cephalopod, used primarily in emptying water from new chambers as the shell ...
en.wiktionary.org
en.wiktionary.org
SIPHUNCLE Definition & Meaning - Dictionary.com
Siphuncle definition: (in a nautilus) the connecting tube that passes from the end of the body through all of the septa to the innermost chamber.
www.dictionary.com
www.dictionary.com
Bisonocerida
The inner surface of the siphuncle contains endosiphuncular deposits, which help distinguish the two orders. In cross-section, they are composed of several bulbous calcareous crests extending into the siphuncle.
wikipedia.org
en.wikipedia.org
Siphuncle | invertebrate anatomy - Britannica
A porous tube called the siphuncle. The chambers contain quantities of water and gas that are adjusted by the siphuncle to achieve neutral buoyancy.
www.britannica.com
www.britannica.com
Soft-Part Anatomy of the Siphuncle in Ammonoids - ResearchGate
The siphuncle is a long and narrow segmented soft tissue that occurs in four extant cephalopods with a phragmocone.
www.researchgate.net
www.researchgate.net
The structure of the chambered nautilus siphuncle: The siphuncular ...
The siphuncle of the chambered nautilus (Nautilus macromphalus) is composed of a layer of columnar epithelial cells resting on a vascularized connective tissue ...
pubmed.ncbi.nlm.nih.gov
pubmed.ncbi.nlm.nih.gov
What is a nautilus? - NOAA's National Ocean Service
The tissue in a canal called the siphuncle [sigh-funk-el] connects all of the interior chambers. As seawater pumps through the living ...
oceanservice.noaa.gov
oceanservice.noaa.gov
SIPHUNCLE definition in American English - Collins Dictionary
2 senses: 1. (in certain cephalopods) a small tube that connects shell-chambers 2. (of aphids) a small siphon on the abdomen by.
www.collinsdictionary.com
www.collinsdictionary.com
Solenochilus
In both the siphuncle is mostly composed of thin connecting rings. The siphuncle in Solenochilus is wider and has a more sinuous profile than that of Acanthonautilus.
wikipedia.org
en.wikipedia.org
Discosorida
with segments that extend into the adjacent chambers, and parietal deposits within the siphuncle that overlap to form endocones. Families differ primarily in the structural details of the siphuncle and in the nature of the aperture.
wikipedia.org
en.wikipedia.org
How do we know that ammonites are a kind of cephalopod rather than another type of mollusc? On a recent fossil hunting trip, I found a small fossil that an expert identified for me as an ammonite beak. He told me such...
It really is mostly the siphuncle as @augurar mentioned. The siphuncle is present in modern ammonites, cuttlefish, and Spirula(a deep-sea squid with an internal chambered shell).
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