. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. REN. large oval space, which contained a _Malpighian body, and several smaller im-shes in which the con- voluted tubes were packed ; d, Malpighian capsule and tube, filled with blood from the Malpighian capillaries; e, fibrinous mould of a urinary tube entangling oil globules, from the urine. a portion from the cortical substance.) It is best examined in a thin section which has been macerated in water for a few minutes, so as to wash away the tubes and Malpighian bodies. The matrix then appears in the form of a fibrous
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. REN. large oval space, which contained a _Malpighian body, and several smaller im-shes in which the con- voluted tubes were packed ; d, Malpighian capsule and tube, filled with blood from the Malpighian capillaries; e, fibrinous mould of a urinary tube entangling oil globules, from the urine. a portion from the cortical substance.) It is best examined in a thin section which has been macerated in water for a few minutes, so as to wash away the tubes and Malpighian bodies. The matrix then appears in the form of a fibrous network, the meshes of which have, for the most part, a circular outline. The smaller meshes are of pretty uniform size, and are accurately filled by the tubes, each tube in its tortuous course passing through very many of the cells formed by this curious and beautiful structure. The meshes do not occupy any one plane or posi- tion rather than another, but in whatever di- rection the section of the cortical substance is made, the same regular network presents it- self. When the tubes are in situ, they often appear to be mapped out, as it were, into re- gular circular or oval portions ; an appearance which has,doubtless, confirmed some observers in the erroneous notion that the tubes termi- nate in blind extremities. This apparent iso- lation of the different parts of what is_in reality a continuous tube, is very much in- fluenced by the condition of the tube itself. In the normal state, the colour of the tubes often contrasts with that of the matrix, which when free from blood is of a whitish colour, so that the tubes are visible through the sub- stance of the matrix, and the observer can trace the continuity of the tube between the different meshes of the tissue. The same observation applies to the tubes when filled with blood ; in some parts of the specimen portions of the tube appear quite isolated, where they are concealed by the overlying matrix (fig. 150, a «), while in
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