The heart is an organ in the circulatory system. Muscle tissue in the heart contracts to pump blood to the body. Connective and epithelial tissues in the heart hold the muscle cells together and in place in the chest. Nervous tissue in the heart coordinates how fast and hard the muscle cells contract.

Based on the information about the heart, which of these best describes the relationship between tissues and organs?
A.
Each type of tissue in an organ can carry out the function of the entire organ.
B.
Organs function best when they are made up of only one type of tissue.
C.
Organs can function because they are made of different types of interacting tissues.
D.
None of the tissues in an organ help the other types of tissue to function.