. Cunningham il libro di testo di anatomia. Anatomia. Le arterie segmentale e loro anastomosi. 1045. rami del somatiche arterie segmentale persistono come la mammaria interna e superiore ed inferiore arterie epigastrico. La scarti laterali dei rami ventrali sono rappresentati dalle arterie cutanee che accompagnano il laterale rami cutanei dei nervi spinali e il ramo laterale del settimo somatiche arteria intersegmental costituisce la maggior parte del gambo arteriosa dell'arto superiore. Il post-costale e post-trans- versetto anastomosi di solito scompaiono nella cassa toracica e lombare

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. Cunningham's Text-book of anatomy. Anatomy. THE SEGMENTAL ARTERIES AND THEIR ANASTOMOSES. 1045. branches of the somatic segmental arteries persist as the internal mammary and superior and inferior epigastric arteries. The lateral offsets of the ventral branches are represented by the cutaneous arteries which accompany the lateral cutaneous branches of the spinal nerves, and the lateral branch of the seventh somatic intersegmental artery forms the greater part of the arterial stem of the upper limb. The post-costal and post-trans- verse anastomoses usually disappear in the thoracic and lumbar regions, but the post-costal anastomoses occasionally persist in the upper thoracic region, and take part in the formation of the vertebral artery, which in such cases arises from the first or second intercostal artery. In some carnivores the post-costal longitudinal vessels persist in the upper thoracic region, and form, on each side, a trunk which is connected with the first aortic intercostal, and which supplies the first five inter- costal spaces. The pre-laminar, the post- central, and the pre- and post- neural anastomoses persist, the latter two aiding in the formation of the thoracic and lumbar portions of the anterior and posterior spinal arteries respectively. It is in the cervical region, however, that the most interesting changes occur. The first six pairs of somatic intersegmental arteries Fig. 843.—Diagram of the Segmental and Intersegmental lose their connexions with the Arteries at a later Period of Development than in dorsal roots of the aortic arches, i.e., Fig. 842. in other words, with the longi- C, Coelom ; D.A, Dorsal aorta ; D.Sp, Dorsal splanchnic anastomosis; tudinal anastomosing channels in In, Intestine; V.E.D, Branch to ventral enteric diverticulum ; this region. The seventh pair, V.Sp, Ventral splanchnic anastomosis. however, persist in their entirety ; and from them are formed, on the right side, a portion of the subclavian trunk, and on the left

Parole chiave associate all'immagine

• bookcentury1900
• bookdecade1910
• booksubjectanatomy
• bookyear1914