Use the similarities and differences you identified to write a paragraph comparing and contrasting the integumentary systems of reptiles and humans.

The integumentary systems of reptiles and humans share several similarities but also exhibit distinct differences. Firstly, both systems serve as a protective barrier for the body, preventing the entry of harmful substances, regulating internal body temperature, and maintaining water balance. Both reptiles and humans have skin composed of layers, including an outer epidermis and an inner dermis. Moreover, both possess glands within their integumentary system, such as sweat glands in humans and scent glands in reptiles, which assist in various functions. However, one significant difference between the two systems lies in their structure. Reptiles have scales made of keratin that cover their skin, forming a sturdy armor-like protection, whereas humans lack scales but have hair follicles, nails, and a wide range of skin colors. Additionally, while humans undergo some degree of cell turnover in their skin, reptiles experience a higher rate of shedding, where they periodically shed their outer layer to accommodate growth or to remove parasites. These disparities highlight the distinctive adaptations of reptiles and humans within their respective environments.

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The integumentary systems of reptiles and humans share similarities in their protective function, temperature regulation, and glandular structures. However, reptiles have scales for protection, while humans have hair follicles and nails. Reptiles regularly shed their skin, while humans undergo more gradual cell turnover. These differences reflect the unique adaptations of reptiles and humans to their environments.