Explain how the four major tissue types work together in the human arm.

The epithelial tissue- covers the body surface and forms the lining for most internal cavities.
Connective tissue- provide a variety of functions including support and protection.
Muscle tissue: 
skeletal-voluntary type of muscle tissue that is used in the contraction of skeletal parts. 
smooth- found in the wall of internal organs and blood vessels.
cardiac- found only in the walls of the heart and is involuntary in nature. 

Little kids are eat dirt all the time so im sure you are fine