[Angiogenesis in intestinal villus].
The aim of this investigation was to study the mechanism of producing the villus micro circular channel pre and postnatal ontogenesis. As an object of the study we had taken the jejunum of a white rat. There was used the method of a scanning electron microscopy of corrosive preparations and serial half thin chips. It was shown that at the 16th day of embryogenesis, the villus hemocircular channel is presented as a blood vessel pincer. On the 20th-21st days on the corrosive preparations at the base of villus it's already produced like a leaf basket of micro vessels. On the 17th day from the birth still it is going increasing of blood vessels in the villus. Simultaneously begins increasing of the new villi of the intestine as well. On the top of blood vessel pincers the micro vessels twist sharply and create peculiar blood vessel plexus. We can suppose that in process of pre and postnatal ontogenesis, the main mechanism of formation of the intestine villus micro blood vessel divides the capillaries into two parallel tubes. Thus, during the villus maturation, intensive maturation processes of morphogenesis, angiogenesis and micro blood vessel constructions take place.
Kiteishvili
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Department of Normal Anatomy, Tbilisi State Medical University.
D000818:Animals; D000831:Animals, Newborn; D007413:Intestinal Mucosa / Q000098:blood supply* / Q000648:ultrastructure*; D007421:Intestine, Small / Q000098:blood supply* / Q000648:ultrastructure*; D018919:Neovascularization, Physiologic / Q000502:physiology*; D051381:Rats