Question

While the human heart is mostly ____ tissue to help it contract, it is part of the ____ system because it transports oxygen and blood through the body. a. muscle; circulatory b. nervous; endocrine c. epithelial; digestive d. connective; integumentary

Answer 1

a. muscle; circulatory

Step-by-step explanation:

While the human heart is mostly muscle tissue to help it contract, it is part of the circulatory system because it transports oxygen and blood through the body.