midgut cecum
(Order Amphipoda):
One of several tubular outpocketings of digestive tract. According to position, one may distinguish:
(1) two pairs of posteriorly directed lateral ceca (two dorsal and two ventral) arising at stomach/midgut border and extending through most of body,
(2) single or paired, anteriorly directed ceca arising mid-dorsally at stomach/midgut border, and
(3) single or paired, anteriorly directed ceca arising from posterior end of midgut. In certain amphipods may also refer to large, unpaired pouch into which esophagus opens. (Syn. cecum) [Stachowitsch, 1992].
(Order Isopoda):
One of up to three pairs of elongate outpocketings of digestive tract. Originates in anterior region of pereon at border of foregut and hindgut and extends through most of pereon. (Syn. digestive cecum, hepatic cecum) [Stachowitsch, 1992].
(Order Leptostraca):
One of up to several pairs of variously developed digestive organs extending either anteriorly or posteriorly from anterior end of midgut. Relatively short, anteriorly directed pair of dorsal ceca are termed dorsal ceca. (sac-like, trilobed) (see also rectal cecum). (Syn. digestive gland, diverticulum) [Stachowitsch, 1992].
(Order Euphausiacea):
Dorsal cecum, hepatic gland [Stachowitsch, 1992].

Crustacea glossary. . 2011.

Look at other dictionaries:

  • cecum — (Order Cladocera): Digestive cecum [Stachowitsch, 1992]. (Order Notostraca): One of two outpocketings of midgut. Elongate and extensively branched with carapace. Opens into digestive tract posterior to esophagus/midgut border. (Syn. midgut… …   Crustacea glossary

  • Midgut — The midgut and hindgut. Latin mesenteron Carnegie stage …   Wikipedia

  • Cecum — For the genus of sea snails, see Caecum (genus). Not to be confused with sacrum. Cecum …   Wikipedia

  • midgut diverticulum — (Order Cladocera): Digestive cecum [Stachowitsch, 1992]. (Order Notostraca): Cecum [Stachowitsch, 1992]. (Order Anostraca): One of two short outpocketings of midgut. Located in head and opening into digestive tract posterior to esophagus/midgut… …   Crustacea glossary

  • midgut — /mid gut /, n. 1. Zool. a. the middle portion of the vertebrate alimentary canal, posterior to the stomach or gizzard and extending to the cecum, functioning in the digestion and absorption of food; the small intestine. b. the anterior portion of …   Universalium

  • midgut — 1. The central portion of the digestive tube; the distal duodenum, small intestine, and proximal colon. 2. The portion of the embryonic gut tract between the foregut and th …   Medical dictionary

  • midgut — mid•gut [[t]ˈmɪdˌgʌt[/t]] n. 1) anat. zool. a) the middle portion of the vertebrate alimentary canal, posterior to the stomach or gizzard and extending to the cecum; small intestine b) the anterior portion of the arthropod colon 2) dvl the middle …   From formal English to slang

  • hepatic cecum — Pouchlike diverticulum generally connected with mesenteron, with liver function; also see hepatopancreas [McLaughlin, 1980]. (Order Cladocera): Digestive cecum [Stachowitsch, 1992]. (Order Cumacea): One of up to four pairs of relatively short,… …   Crustacea glossary

  • digestive cecum — (Order Cladocera): One of two lateral outpocketings of midgut; located in head posterior to border of esophagus and midgut. An additional unpaired cecum may open into posterior end of digestive tract. (Syn. cecum, hepatic cecum, midgut… …   Crustacea glossary

  • dorsal cecum — (Order Mysida): Typically unpaired dorsal outpocketing of digestive tract at border of pyloric stomach and midgut. (paired, unpaired) (see also lateral cecum). (Syn. dorsal diverticulum) [Stachowitsch, 1992]. (Order Euphausiacea): One of two… …   Crustacea glossary

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