(含章节 Insects have a rather hard exoskeleton,composed of a number of 教学内容、 specialized layers that provide protection against substances and 学时分配、 microbes 教学方法、 Insect's integument comes from extra-embryonic ectoderm( 辅助手段) 层)， 1.Integument's consosts The integument consosts three Lays: (i)the cuticle Two main layers may be discerned in the cutide,an outer epiactide and an inner prautide. The epiactide is a very thin layer devoid of chitin and of complex chemical composition and ultrastructure. It is the first layer to be secreted in the cyde of cutide formation The cement layer..(护蜡层)secreted by epidermal glands and poured out over the surface The main chemistry composition is fat and proteins which properties are very stable The cement layer is very different in different insects eg: The Apidae Genus(蜜蜂属)insect's body have no cement layer Laccifer Lacca(紫胶虫)'s body have very thick cement layer (ii)the epidermis The epidermis forms a continuous single layer of cells,the plasma membranes of which are joined by numerous septate desmosomes. Not only does the epidermis secrete the greater part of the cutide but it also produces the moulting fluid.which dissolves the old endocutide before the immature insect moults,it absorbs the digestion products of the old cutide.Repairs wounds and differentiates in such a way as to determine the surface pattens of the insect. (iii)the basement membrane The Basement Membrane is a continuous layer about 0.5um thick with an amorphous ultrasructare.（含章节 教学内容、 学时分配、 教学方法、 辅助手段） Insects have a rather hard exoskeleton, composed of a number of specialized layers that provide protection against substances and microbes Insect’s integument comes from extra-embryonic ectoderm(外胚 层), 1.Integument’s consosts The integument consosts three Lays: (i)the cuticle Two main layers may be discerned in the cutide, an outer epiactide and an inner prautide. The epiactide is a very thin layer devoid of chitin and of complex chemical composition and ultrastructure. It is the first layer to be secreted in the cyde of cutide formation The cement layer.(护蜡层) secreted by epidermal glands and poured out over the surface The main chemistry composition is fat and proteins which properties are very stable The cement layer is very different in different insects eg: The Apidae Genus(蜜蜂属）insect’s body have no cement layer Laccifer Lacca(紫胶虫）’s body have very thick cement layer (ii)the epidermis The epidermis forms a continuous single layer of cells,the plasma membranes of which are joined by numerous septate desmosomes. Not only does the epidermis secrete the greater part of the cutide but it also produces the moulting fluid.which dissolves the old endocutide before the immature insect moults,it absorbs the digestion products of the old cutide.Repairs wounds and differentiates in such a way as to determine the surface pattens of the insect. (iii)the basement membrane The Basement Membrane is a continuous layer about 0.5ūm thick with an amorphous ultrasructare