節(jié)片愈靠近頸部的愈幼小，愈近后端的則愈寬大和老熟。依據(jù)節(jié)片內(nèi) 生殖的成熟情況可分為未成熟節(jié)片（Inmmature proglottid）、成熟節(jié)片（mature proglottid）和孕卵節(jié)片或稱妊娠節(jié)片（gravid Proglottid）3種。未成熟節(jié)片寬大于長，內(nèi)部構(gòu)造尚未發(fā)育。成熟節(jié)片近于方形，內(nèi)有雌雄生殖。孕卵節(jié)片長方形，幾乎全被子宮所充塞。絳蟲的體壁與吸蟲的基本相同，不同點是在皮層的表面具有很多微毛（microtriches），能增加表面積。絳蟲沒有消化系統(tǒng)，沒有口及腸，而是通過皮層直接吸收食物，它比吸蟲的更為突出，微毛的存在增加了吸收的表面積。在皮層內(nèi)具有大量的線粒體，這表明吸收可能需要能量，可能有主動運輸（active transport）的過程。皮層也可通過寄主的酶促進食物的消化作用。絳蟲吸收的營養(yǎng)物主要以糖原的形式儲存于實質(zhì) 中。通過厭氧呼吸以獲得能量。排泄系統(tǒng)排泄也屬原腎管型，由焰細胞和許多小分枝匯入身體兩側(cè)的兩對側(cè)縱排泄管(一對在背面，一對在腹面)組成。在每個節(jié)片的后端2條腹排泄管問又有一橫排泄管相連，在成熟節(jié)片中背排泄管消失，在頭節(jié)2對排泄管間形成一排泄管叢，在zui末一個節(jié)片的后方左右二腹排泄管會合，并由一總排泄孔通出體外，若該節(jié)片斷離身體，則兩條縱排泄管末端與外界相通的孔即為排泄孔，不再形成總排泄孔。
The younger the closer the piece is to the neck, the more generous and mature the closer to the back end. According to the maturation of the intra-segmental reproduction, immature proglottid, mature proglottid and progesterone segments or gravid proglottid can be divided into three types. The width of immature slices is longer than long and the internal structure is not yet developed. Mature segments near square, with male and female reproduction. The rectangular section of a pregnant egg is almost compley filled with uterus. The body wall of aphids is basically the same as that of trematodes. The difference is that there are many microtriches on the surface of the cortex, which can increase the surface area. The aphid has no digestive system, no mouth and intestines, but directly absorbs food through the skin. It is more prominent than the flukes, and the presence of micro-hairs increases the surface area for absorption. There are a large number of mitochondria in the cortex, suggesting that absorption may require energy and may have a process of active transport. The cortex can also promote the digestion of food through the host's enzymes. The nutrients absorbed by aphids are mainly stored as glycogen in nature. Anaerobic breathing for energy. The excretory system excretion is also of the original renal type, with flame cells and many small branches leading to two pairs of lateral excretory ducts on the sides of the body (one on the back and one on the ventral surface). At the rear end of each segment, two ventral drainage tubes are connected with a horizontal drainage pipe. In the mature section, the back drainage pipe disappears. In the first section, two drainage pipes are formed between the drainage pipes. At the last section, The rear drainage tube of the left and right sides of the sheet meets and discharges from the body through a total drainage hole. If the section is separated from the body, the holes communicating with the outside of the ends of the two vertical drainage tubes are drainage holes and no longer form a total drainage hole. .

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