How do the Integumentary system work with the endocrine system?

The integumentary system, which includes the skin, hair, and nails, works closely with the endocrine system by serving as a barrier that regulates the absorption of hormones and other substances. For example, the skin can produce vitamin D in response to sunlight, which is essential for calcium metabolism influenced by hormones like parathyroid hormone. Additionally, the skin's sweat glands and sebaceous glands are regulated by hormones, helping to maintain homeostasis and respond to various physiological conditions. Together, these systems play a crucial role in maintaining overall health and regulating bodily functions.