Skin Development in the Gray Short-Tailed Opossum (Monodelphis Domestica) - From Skin Respiration to Thermoregulation

The study on the gray short-tailed opossum (Monodelphis domestica) investigates the postnatal development of skin, focusing on the transition from skin respiration to thermoregulation. Initially, the opossum's thin skin facilitates significant cutaneous gas exchange due to a dense capillary network. As the opossum matures, the skin thickens, hair follicles and sweat glands develop, and by day 35, the skin is fully developed with a complete pelage, enabling effective thermoregulation. The study highlights the functional transformation of the skin in relation to the immature cardiac and respiratory systems at birth, which mature enough to support the organism by day 7. This development is crucial for the opossum's adaptation from reliance on cutaneous respiration to effective thermoregulation and parallels the maturation of the lung and thermoregulatory systems.