. Compendium of histology. Histology. GLAND TISSUE. 131. Fig. 120.—Human racemose pala- tine glands. formed. It may acquire an excretory duct, and then the race- mose gland, in its smallest and most simple form, is complete. But these most elementary structures are rare. As a rule (Fig. 120), several acini form the still small gland body. In larger and large organs the num- ber of the gland lobules becomes very great. It is scarcely necessary to remark that transitions occur between the tubular and racemose glands. 3. Finally, we have another gland with closed rounded gland capsules, which lat
. Compendium of histology. Histology. GLAND TISSUE. 131. Fig. 120.—Human racemose pala- tine glands. formed. It may acquire an excretory duct, and then the race- mose gland, in its smallest and most simple form, is complete. But these most elementary structures are rare. As a rule (Fig. 120), several acini form the still small gland body. In larger and large organs the num- ber of the gland lobules becomes very great. It is scarcely necessary to remark that transitions occur between the tubular and racemose glands. 3. Finally, we have another gland with closed rounded gland capsules, which latter are contained in abun- dant connective tissue. This is the ovary. These rounded .structures, which are constituted by a connective-tissue wall, are called the Graafian follicles. Among the cells it con- tains, one is noted for its size. This is the ovum (Fig. 5). That the latter becomes free by the rupture of the follicular wall, we have mentioned above. Let us also add that the ruptured follicle is incapable of further repair, but rather goes to ruin by a process of cicatrization. The conditions are, therefore, in contradistinction to those presented by other glands, peculiar and anomalous enough. a The second and much more important constituent of our organ is presented by the gland cells. We shall subsequently see that they are nearly all derivatives of Remak's corneous and intestinal-gland layer. Even in subsequent life, this epi- thelial character is not renounced. The inner surfaces of the membrana propria are thus lined, sometimes simply, sometimes in strata. In the excretory portion of the gland, an ordinary epithelium subsequently makes its appearance. The gland cell may be called a micro- scopically small chemical laboratory. With its body it forms the secretion, or changes the formative material received from the blood into the latter. For this purpose our cells require a certain Please note that these images are extracted from scanned page images t
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