ELECTRON-MICROSCOPE OBSERVATIONS OF BODYWALL OF TRICHURIS-SUIS, SCHRANK, 1788 (NEMATODA-TRICHUROIDEA) .2. HYPODERMIS AND SOMATIC MUSCULATURE
ELECTRON-MICROSCOPE OBSERVATIONS OF BODYWALL OF TRICHURIS-SUIS, SCHRANK, 1788 (NEMATODA-TRICHUROIDEA) .2. HYPODERMIS AND SOMATIC MUSCULATURE
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DOI：
10.1007/bf00329600
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发表时间：
1972-01-01
期刊：
影响因子：
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通讯作者：
JENKINS, T
中科院分区：
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作者：
JENKINS, T
猪鞭虫索间皮下组织具有细胞结构。虽然皮下细胞代谢活跃，但它们不具备在成虫体内进行广泛蛋白质合成的能力。它们与上覆的角质层密切相关，后者仅由三层膜分开。一个稳定的机械关系似乎是维持角质层和皮下组织之间的存在下，短的皮下组织的预测是锚定在基底层的角质层。从肌肉组织到角质层穿过皮下组织的纤维也可能有助于这种稳定性，以及允许肌肉牵拉角质层。下皮细胞中含有糖原和脂质，表明它们也可作为储存中心。神经轴突在正中下皮索的胞质分支中明显地表现为许多封闭的膜结合轮廓。它们是无髓鞘的，含有微管，两种类型的囊泡和微小的线粒体。两种不同类型的肌丝（肌球蛋白和肌动蛋白）包裹着体肌细胞的收缩肌原纤维区。这些是纵向排列的，但没有显示出任何横纹，因此肌肉不适合光滑或横纹的类别。这种形态学模式与其他线虫中所解决的模式进行了比较。肌肉的肌原纤维区呈肌浆球的形式，并含有细胞核和丰富的糖原供应。虽然它似乎在肌肉收缩中不起作用，但它是肌肉活动期间可能使用的代谢储备的重要仓库。
The intercordal hypodermis of the pig whipworm,Trichuris suispossesses a cellular organization. Although the hypodermal cells are metabolically active they are not equipped to carry out extensive protein synthesis in the adult parasite. They are intimately associated with the overlying cuticle being separated from the latter only by a triple-layered membrane. A stable mechanical relationship appears to be maintained between cuticle and hypodermis by the presence of short hypodermal projections which are anchored in the basal layer of the cuticle. Fibres which traverse the hypodermis from the musculature to the cuticle may also contribute to this stability as well as allowing the muscles to pull on the cuticle. The inclusion of glycogen and lipid in the hypodermal cells indicates that they may also serve as storage centres.The nerve axons are evident as a number of closed membrane-bound profiles amongst the cytoplasmic branches of the median hypodermal cord. They are unmyelinated and contain microtubules, two types of vesicles and tiny mitochondria. The possible role of these axonal inclusions in nervous transmission is discussed.Two distinct types of myofilaments (myosin and actin) characterise the contractile, myofibrillar region of the somatic muscle cells. These are arranged longitudinally but do not show any cross-striations so that the muscle does not fit either the smooth or striated category. This morphological pattern is compared with that resolved in other nematodes.The amyofibrillar region of the muscle takes the form of a sarcoplasmic bulb and harbours the nucleus and an abundant supply of glycogen. While it appears to play no part in muscle contraction it serves as an important depot of metabolic reserves which may be utilised during muscular activity.