The Development of the Integumentary System in Dogs

Abstract

The skin and its appendages are components of the integumentary system. Particularly in dogs, the appendages are: the hair, claws, footpads, and sebaceous, sweat and mammary glands. Few studies report the initial development of these structures in domestic species. The present study aimed to describe the development of the integumentary system during the embryonic and fetal periods in dogs (Canis familiaris). Totally, 9 embryos and 31 fetuses were used for gross and microscopic descriptions. Macroscopically, the skin of concepts in embryonic ages had a translucent aspect, which allowed for the visualization of internal organs with a remarkable presence of blood vessels. The skin appendages were only identified in fetuses. Microscopically, in the embryonic period, the epidermis consisted of a single surface layer of flattened cells denoted the germinativum stratum or germinal layer. Later, a new layer form due the proliferation of keratinocytes to form the periderm. When the epidermis of the fetus was observed. There was more than one cell layer that developed between the germinal and periderm layers. In conclusion, the skin shows little development during the embryonic period, whereas its division into the dermis and epidermis and the formation of several cell layers is pronounced in the fetal period. Similarly, skin appendages developed during the fetal period.

Evaluación de la calidad en champú comercial no medicado para perros en la Ciudad de México

“…(6) La piel del perro es anatómica y fisiológicamente diferente a la piel humana; es menos ácida, más delgada y tiene una mayor densidad de folículos pilosos que la piel humana. (39) Por lo tanto, el valor del pH de la piel de los caninos difiere del de los humanos y tiende a ser más alto que en de la mayoría de las otras especies de mamíferos. Según Proksch, (11) el valor promedio de pH en humanos es de 4.1-5.8, y el pH de la piel en perros está entre 6 y 7.…”

Polish Journal of Veterinary Sciences

“…The skin is an anatomical and physiological barrier between the body and the environment; it protects animals from physical, chemical, and microbiological damage (Miller et al 2013, Ríos et al 2015. Dog skin is anatomically and physiologically different to human skin; it is less acidic and thinner, it lacks sweat glands across much of the body except for the footpads, and it has a higher density of hair follicles than human skin (Oliveira et al 2015). The pH influences the permeability of the skin barrier and normal keratinization processes.…”