human
Question: Which sentence best describes the organization of the heart?

Choices:
A) The heart is an organ made up of different types of tissues, each of which has different types of cells.
B) The heart is a tissue made up of different types of organs, each of which has different types of cells.
C) The heart is a system made up of one type of tissue and identical cells.
D) The heart is a tissue made up of one type of organ and identical cells.
gpt
The correct answer is 0: The heart is an organ made up of different types of tissues, each of which has different types of cells..