Answer:
its 3. Cardiac muscle contracts.
Explanation:
I took the test and put the wrong answer and the correct one showed up.
One of the ways through which the circulatory system works at the tissue level would be the contraction of cardiac muscles for the pumping of blood.
Muscles are generally known to be at the tissue level of organization. In order for the circulatory system to work, blood must move around the body,
The movement or circulation of blood around the body is sustained by a pumping organ - the heart. The heart can only pump blood by the contraction of cardiac muscle tissues.
Thus, the contraction of the cardiac muscles represents one of the ways through which the circulatory system works at the tissue level.
More on the circulatory system can be found here: https://brainly.com/question/22258254?referrer=searchResults
