integumentary, immune, lymphatic and skeletal systems

1. The lymphatic and the immune system share similar organs, such as the lymph node.

2. The integumentary system produces vitamin D, which is the bones in the skeletal system need.

3. The skin's, or the integumentary system's, first defense mechanism is the immune system.

4. The skeletal system incorporates lymphocytes, which are important to support the body's immune system.

5. All the different systems all work together in order to keep the body properly functioning.

6. All of the systems protect the body from harm in their own ways.