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題 名 | Morphology and Ultrastructure of the Alimentary Canal of the Oriental Fruit Fly, Bactrocera Dorsalis (Hendel) (Diptera: Tephritidae)(2): The Structure of the Midgut=果實蠅Bactrocera dorsalis (Hendel) 消化管之形態及超薄顯微鏡結構之研究(2):中腸之結構 |
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作 者 | 洪純女; 林泰郎; 李文蓉; | 書刊名 | 動物研究學刊 |
卷 期 | 39:4 2000.10[民89.10] |
頁 次 | 頁387-394 |
分類號 | 387.795 |
關鍵詞 | 柱狀細胞; 杯狀細胞; 間介細胞; 再生細胞; Columnar cells; Goblet cells; Interstitial cells; Regenerative cells; |
語 文 | 英文(English) |
中文摘要 | 本研究係利用光學顯微鏡和穿透性電子顯微鏡研究東方果實繩Bactrocera dorsalis(Hendel)中腸之形態和超薄顯微的構造。果實蠅的中腸為全消化管最長部份,全長約16mm,前一小部份呈管狀,位於胸部體腔內,後部呈迴轉狀態,位於腹部前三節體腔。在上皮細胞層(epithelium)上方著生整齊的絨毛(microvilli);腸腔(lumen)和絨毛之間,有兩層構造的圍食膜(peritrophic membrane),此膜的功能係防止食物碎粒擦破上皮細胞。中腸外表被兩層允內包圍著。中腸細胞具四種細胞:柱狀細胞(regenerative cell or nidi);其中以柱狀細胞最多,僅少數杯狀細胞分布於中腸之中段,再生細胞為尚未發育之細胞,分布於上皮細胞基部。此等細胞之微細結構與消化酵素,分泌及營養分子吸收之功能,詳述及討論於本文中。 |
英文摘要 | The midgut of Bactrocera dorsalis (Hendel) was studied by using light and transmission electron microscopy. The midgut of this insect, the longest part of the entire almentary canal, is about 16mm in length. Its anterior portion is shaped as a tube located in the haemocoel of the thorax, while the most distal part is coiled and embedded in the first three abdominal segments. The midgut epithelium is characterized by a striated border of microvilli, and 2 layers of the peritrophic membrane lie in the gut lumen to protect the midgut cells from possible damage from abrasive food particles. The epithelium is surrounded by 2 layers of muscles and comprised of 4 different types of cells: columnar, goblet, interstitial, and regenerative cells (or nidi). Columnar cells comprise the majority in the epithelium, while a few goblet cells associated with the interstitial cells are found in the middle part of the midgut. Regenerative cells are undeveloped cells lying as a group at the basal portion of the epithelial cells. The structure and function of secretion of digestive enzymes and absorption of nutrients in the midgut epithelium of this fly are discussed. |
本系統中英文摘要資訊取自各篇刊載內容。