Structural and vascular changes accompanying the resorption of the proctodaeal processes after birth in the embryos of the Goodeidae, a family of viviparous fishes
Structural and vascular changes accompanying the resorption of the proctodaeal processes after birth in the embryos of the Goodeidae, a family of viviparous fishes
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DOI：
10.1002/jmor.1050610106
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发表时间：
1937-06-01
影响因子：
1.5
通讯作者：
Mendoza, G
中科院分区：
文献类型：
--
作者：
Mendoza, G
描述了在所调查的不同物种(Skiffia bilineata、Zoogoneticus cuit-zeoensis、Z.diazi、Girardinichthys inominatus和Goodea luitpoldi)中遇到的过程类型。包括出生前的性腺、中肾导管、尿窦和肠道的形态和结构。出生后，这些器官的形态只有很小的变化。最重要的结构变化涉及肠道末端的完全外胚层重建，以形成真正的直肠。不同物种的突起的血管供应是相似的，只是在细节上有所不同。动脉的供应是由一条肠系膜动脉沿肠道延伸提供的。动脉的数量和它们在肠道开口处的位置取决于该点上突起的数量和位置。有两条静脉通道引流突起；一条是躯体静脉，流入尾静脉，另一条是内脏静脉，通过肠下静脉排空到肝门。前者引流后突，后者引流前突。这一基本模式在所调查的所有物种中都是恒定的。对突起表面丰富的毛细血管丛进行了描述。随着出生后突起的重新吸收，供应突起的血管发生了不同程度的改变。到蚂蚁的静脉。突起和单个动脉被中断。引流柱子的静脉要么消失，要么部分保留，正在经历二次连接。
The types of processes encountered in the various species investigated (Skiffia bilineata, Zoogoneticus cuit-zeoensis, Z. diazi, Girardinichthys innominatus, and Goodea luitpoldi) are described. There is included the topography and structure before birth of the gonads, mesonephric ducts, urinary sinus and gut. Following birth, there are but slight changes in the topography of these organs. The most important structural change involves a complete ectodermal reconstitution of the end of the gut to form a true rectum. The vascular supply to the processes in the different species is similar and varies only in the minute details. The arterial supply is furnished by an extension of a single mesenteric artery along the gut. The number of arteries and their position at the gut opening depends on the number and position of the processes at that point. Two venous channels drain the processes; one is somatic and drains into the caudal vein, the other is visceral and empties into the hepatic portal through the subintestinal vein. The former drains the posterior process, the latter, the anterior processes. This basic pattern is constant in all species investigated. A description of the rich capillary plexus on the surface of the processes is included. With the resorption of the processes after birth, vessels that supply them become variously modified. The vein to the ant. processes and the single artery are discontinued. The vein that drains the post, processes either disappears or is retained in part, undergoing secondary connections.