Origin, developmental changes and homologies of the stage morphostructures were considered according to their location in three morphogenetic fields. The first, or central, field forms at the prodissoconch I stage. It can be inherited by prodissoconch II and nepioconch stages in one taxa, or PD-II, N and dissoconch stages in others. The second, or postero-dorsal, field appears at the N stage, and the third field, or antero-dorsal, at the D stage.

主要對3個(gè)形態(tài)發(fā)生區(qū)域的階段形態(tài)結(jié)構(gòu)的起源日本黄色网站进入入口、發(fā)育變化和同源性做了研究，其一国产AV一区网站，即中央?yún)^(qū)域午夜精品乱人伦小说区，開始形成于前雙殼I期，在某個(gè)分類單元它可以在前雙殼II期和幼貝期形成一级做a午爰片久久毛片A片午，而在其它分類單元?jiǎng)t在前雙殼II期欧美色淫淫、幼貝期和雙殼期形成；第二區(qū)域精品爱99视频在线，即背部后區(qū)美女黄网站国产免费久99，在幼貝期出現(xiàn)；第三區(qū)域97超级对对碰，即背部前區(qū)免费一级黄色片操逼播放，出現(xiàn)于雙殼期。

The location and structures of sex-pheromone-producing gland in female H.insularis were studied by EAG,GC,SEM,and TEM.These studies showed that thegland situate in the intersegmental membrane between the eighth and ninthabdominal segments,and is an eversible abdominal fold;Many plump cones disturbon the surface of the gland.The glandular cells of 2-day old virgin female H.insularis are arranged in one layer,among which the central cells are columnarepithelial cells and flat on two sides.The nucleus is irregular elliptical.There isevident conjugation between cells and the involution is more in the basal membraneof cell.Microvilli are distributed on the cytoplasmic membrane and linked withendocuticle on which there are many layers of chitin,and the outer cuticule is staineddeeper.The cell contains bubbles,mitochondria,glycogen deposits,roughendoplasmic reticulum and smooth endoplasmic reticulum.

結(jié)合觸角電位一级免费A片、毛細(xì)管氣相色譜美女裸动图一区二区三区操、掃描電鏡、透視電鏡等技術(shù)對小線角木蠹蛾雌蛾腹尖末端不同組織部位提取物的測定分析以及腺體位置和形態(tài)結(jié)構(gòu)的觀察發(fā)現(xiàn)：小線角木蠹蛾性信息素分泌腺位于腹部末端8～9節(jié)之間永久观看免费揉美女网站成永久免费，是一個(gè)由節(jié)間膜特化而成的上皮結(jié)構(gòu)亚洲欧美日韩综合另类旡码一级，為一可外翻的腹褶，腺體表面分布著飽滿的錐形體人禽交欧美网站，羽化后2天未交尾的雌蛾腺體細(xì)胞呈單層排列久久久久精品久久久久影院，腹面中央由密集的柱形上皮細(xì)胞組成，細(xì)胞排列向兩側(cè)延伸至背部十八禁止网址，其形狀由柱形逐漸變?yōu)楸馄叫渭で楣鶤v做激情国产爱，?xì)胞核為橢圓形，細(xì)胞與細(xì)胞間有明顯的胞連接欧美一级黄片直播，細(xì)胞基底膜基褶較多欧美18xxxx，質(zhì)膜上分布著微絨毛，并與內(nèi)表皮連接夜夜草AV，內(nèi)表皮上有多層幾丁質(zhì)色色色色免费，外角質(zhì)層染色較深囯片产av无码毛片一级，細(xì)胞質(zhì)中含有空泡、線粒體国产人人操人人摸富、脂質(zhì)粒在线日韩成人电视播放器、粗面內(nèi)質(zhì)網(wǎng)和光面內(nèi)質(zhì)網(wǎng)。

Central and postero-dorsal field morphostructures exhibit developmental sequences, or a system of characters which possess polarity, in contrast to adult characters applied in mytilid taxonomy.

與在貽貝分類學(xué)上應(yīng)用的成體特征相比性福利网站，早期發(fā)育階段中央和背部后區(qū)的形態(tài)結(jié)構(gòu)顯示出很明顯的發(fā)育順序或特征變化規(guī)律国产精品最新自拍91。

Hume's should have rather poor supercilium/ crown contrast (as the supercilium should be off-white-buff rather than white) and have rather grey-black centres to coverts and tertials (offering reduced contrast with the mantle and also with the wing bars).

休氏柳鶯應(yīng)該有比較不明顯的眉線/頭側(cè)線對比（因?yàn)槊季€是略帶皮黃色的白色而非白色），而且覆羽和三級飛羽中央是偏灰黑色亚洲级黄色视频，導(dǎo)致和背部與翼帶的對比比較不明顯中国av在线网站。

Totally 32 healthy New Zealand rabbits received design of 6 cm ×2 cm random flaps on trachelo-back and simultaneous implantation of central arterial and venous bundles of left ear as well as free PC chaffs of right ear into flaps, which formed in different time island-like PC flaps taking vascular bundle as pedicle.

健康新西蘭大白兔32只，在項(xiàng)背部設(shè)計(jì)6cm 2cm的任意皮瓣男把女日出了白浆的免费视频，將左耳中央動(dòng)国产色网站农村、靜脈束及右耳游離的軟骨膜片同時(shí)植入皮瓣下，在不同時(shí)間形成以該血管束為蒂的島狀軟骨皮瓣精品91，觀察血管化進(jìn)程久久这只有免费精品；另在不同時(shí)間取出預(yù)構(gòu)軟骨皮瓣中的軟骨膜，觀察其形成軟骨情況无码在线一本。

For the existence Be nearing to polar people to say, usually the sexual snow blizzard makes them have a very great difficulty on the transportation, so develop is been excellent by the physical strength, and resistant to cold dog dog to pull sledge, become their main vehicle, and this kind of physical strength good,run of quick,like to train,and the resistant to cold dog dog BE"Husky".

簡介：哈士奇最引人注目的地方大概就是那張有點(diǎn)像野狼黄色片视频国产在线观看免费，又像化過妝的臉；一般來說哈哈的眼睛上方都會(huì)有兩塊白毛區(qū)国产精品青草国产一区二区，臉的正中央也會(huì)有一道白色線久草手机视频，所以有人就說哈士奇的臉是三把火。哈士奇在大型犬中算是輕量級的體重欧美性交v，但在他膨松漂亮的體毛下性爱视频网址，卻擁有強(qiáng)力的後肢肌肉與有力的背部，而且胸部發(fā)達(dá)无码人妻一区二区免费视频，一看就像是運(yùn)動(dòng)健將国产一级婬片A网站。

middling：中等的

middleweight 平均體重 | middling 中等的 | middorsal 背部中央的

middy：海軍校生

middorsal 背部中央的 | middy 海軍校生 | midfield 中場的

middy：水手衫

middorsal 背部中央的 | middy 水手衫 | middy 海軍校生

Parapodium：側(cè)足

軟體動(dòng)物腹足綱中的后鰓亞綱大黄毛片、翼足目等,其足的中央部,即中足的側(cè)緣擴(kuò)大成鰭狀,稱為側(cè)足. 后鰓亞綱之左右側(cè)足在背部重合,形成包裹內(nèi)臟塊的管狀構(gòu)造,能將水通過此管有力地壓向后方,從而使身體運(yùn)動(dòng). 此外,側(cè)足(parapodium)還具有疣足的意義.

centrodorsal：背部中央的

\\"尖齒的\\",\\"centrodontous\\" | \\"背部中央的\\",\\"centrodorsal\\" | \\"中樞性運(yùn)動(dòng)\\",\\"centrokinesis\\"

middlings：中級品二級品

middlings 小麥粗粉 | middlings 中級品二級品 | middorsal 背部中央的

middorsal：背部中央的

middling 中等的 | middorsal 背部中央的 | middy 海軍校生

protocerebrum：前腦

現(xiàn)代昆蟲的腦,雖在外形上有許多變異,但都是由前腦(protocerebrum)熟女性生活视频、中腦(deutocerebrum)和后腦(tritocerebrum)組成的. 后腦以圍咽神經(jīng)索與咽喉下方的食道下神經(jīng)節(jié)相連接. (1)腦橋體(pars intercerabralis) 多為馬蹄形,位于前腦背部中央,