A Study of the Fine Structure of the Epidermis of Rana Pipiens
نویسندگان
چکیده
The epidermis of adult Rana pipiens has been studied by electron microscopy and histological and histochemical methods. It was found that the epidermis is engaged in the production of both keratin and mucus. The basal cells are mainly filled with tonofilaments, whereas the cells located in the mid-portion of the epidermis contain both tonofilaments and mucous granules. Golgi vesicles and endoplasmic reticulum are found in relative abundance in the mucus-producing cells and seem to be involved in the production of mucous granules. The mucus seen was partly retained within the cells and partly secreted into the intercellular spaces. The outermost keratinized cells contain mainly filaments and a few remnants of cell constituents.
منابع مشابه
The Epidermis of Rana Pipiens
The epidermis of adult Rana pipiens has been studied by electron microscopy and histological and histochemical methods. It was found that the epidermis is engaged in the production of both keratin and mucus. The basal cells are mainly filled with tonofilaments, whereas the cells located in the mid-portion of the epidermis contain both tonofilaments and mucous granules. Golgi vesicles and endopl...
متن کاملThe fine structure of nuclear and cytoplasmic inclusions in primary renal tumors of mutant leopard frogs.
This investigation summarizes a study of the incidence and fine structure of primary renal tumors found in mutant leopard frogs (Rana pipiens burnsi). Of 204 winter frogs autopsied from Minnesota and South Dakota, renal tumors were found in 13 animals, an incidence of 6.4%. Light microscopic examination showed that all of the renal tumors had Cowdry Type A nuclear inclusions. The fine structure...
متن کاملThe regeneration of axolotl limbs covered by frog skin.
Forearm skin of Stage XXIV Rana pipiens, which cannot regenerate limbs, was removed and placed upon the skinned forearms of young axolotls. The axolotl limbs were amputated immediately through the level of the grafts. Frog epidermis migrated to cover the amputation surface. Dedifferentiation and early blastema formation occurred beneath the frog wound epidermis. Limb regeneration continued, but...
متن کاملMycosis fungoides and alopecia areata: A case report
Mycosis fungoides (MF), the most common type of cutaneous T-cell lymphoma, is histologically characterized by atypical T lymphocytes with cerebriform nuclei that infiltrate the epidermis. Alope
متن کاملDifferentiation of Cells of the Rana pipiens Gastrula in Unconditioned Medium 1 by LESTER G . BARTH
INSTANCES of differentiation in absence of an inductor have multiplied to such extent that the classical picture of embryonic induction is in process of serious re-examination (Grobstein & Parker, 1958; Nieukoop, 1955; Trinkaus & Groves, 1955). Questioned on the basis of the occurrence of neural differentiation without organizer in explants of presumptive epidermis (Barth, 1941; Holtfreter, 194...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- The Journal of Cell Biology
دوره 20 شماره
صفحات -
تاریخ انتشار 1964