Textbook of normal histology: including an account of the development of the tissues and of the organs . beingsomewhat thickened. The striated car-diac muscular tissue is continued for ashort distance in the walls of those partsof the venae cavae and of the pulmonary veins immediately adjoiningthe heart; the explanation of this fact is found in the derivation ofthese portions of the vessels from the tissues of the primitive heart-tube. THE CAPILLARIES. The capillaries establish the only communication, with few excep-tions, between the arteries and the veins, and, further, provide theintimate a
Textbook of normal histology: including an account of the development of the tissues and of the organs . beingsomewhat thickened. The striated car-diac muscular tissue is continued for ashort distance in the walls of those partsof the venae cavae and of the pulmonary veins immediately adjoiningthe heart; the explanation of this fact is found in the derivation ofthese portions of the vessels from the tissues of the primitive heart-tube. THE CAPILLARIES. The capillaries establish the only communication, with few excep-tions, between the arteries and the veins, and, further, provide theintimate anatomical relation between the nutritive current and thetissues of the body necessary for the maintenance of the integrityand functional activity of the various organs. As exceptions to theusual intervention of the capillaries between the arterial and venousradicles, the direct communication between these vessels existing inthe erectile tissue of the genital organs, in the spleen, and in someparts of the peripheral circulation, as in the tips of the fingers andtoes and of the nose, may be Section of human vein of mediumsize: /, M, and A, respectivelyintima, media, and adventitia. THE CIRCULATORY SYSTEM. 99 Fig. 123.
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Keywords: ., bookauthorpiersolgeorgeageorgea, bookcentury1800, bookdecade1890
