Titlebook: Development of the Digestive System in the North American Opossum (Didelphis virginiana); William J. Krause,J. Harry Cutts Book 1992 The E

reaching

Introduction,opossum have been published. More recently, . has become popular as an animal model for gastroenterological studies because of the remarkable anatomical and physiological similarities of the esophagus as compared to that of man.

Callus

lethal

Pancreas,eatic duct does not develop. Simultaneously, the ventral pancreatic anlage forms during day 11, originating as a branch of the hepatic diverticulum. Just prior to birth (12th day of gestation), the ventral and dorsal anlagen unite and are connected to the proximal duodenum by a single excretory duct derived from the ventral portion (McCrady 1938).

Nefarious

草率女

不能妥协

Concluding Remarks,ly blastocyst formation in metatherians are available and have been used to study the early developmental biology of Australian marsupials (Selwood and Young 1983; Selwood 1986, 1987, 1989) as well as later developmental stages of . (New and Mizell 1972).

majestic

Liver,ver enlarges rapidly during the 11th and 12th days and is actively hemopoietic prior to birth. A well-defined ventral segment of the original liver diverticulum is the anlage of the gallbladder (McCrady 1938).

包租车船

Reinhard H. Schmidt,Eva Terbergerells is characterized by numerous free ribosomes, occasional profiles of granular endoplasmic reticulum, and scattered mitochondria. There is little morphological evidence to suggest absorptive activity by the endoderm at this time in .. Similar observations have been reported in the . (Enders and E

heterogeneous

Reinhard H. Schmidt,Eva Terberger987). These factors include hypophysial hormones or tissues under hypophysial control, endogenous gastrointestinal hormones from enteroendocrine cells, neurotransmitters from the enteric nervous system, factors present in luminal content (amniotic fluid, milk, or dietary factors), and intrinsic mech

粗糙滥制