Respiratory & Digestive: provide oxygen & nutrients to the skin to help it remain healthy. Circulatory: Oxygen & nutrients for the skin travel through blood vessels in the Cardiovascular system. Lymphatic: picks up excess fluid from the skin to avoid excess swelling. Skeletal:d provides shape & support. Endocrine: hormones from here regulate hair growth & hydration. Integumentary: serves to protect internal organs, including those in the reproductive system.