Wisconsin CNA State Exam Vocabulary Practice

Where is heart or cardiac muscle tissue found?

1. Lungs

2. Stomach

3. Heart only

4. Throughout the body

The correct answer is: Heart only

Heart or cardiac muscle tissue is specifically found in the heart, which is its primary location. This specialized muscles' unique structure allows it to contract rhythmically and involuntarily, a necessary function to pump blood throughout the body consistently. The heart is the central organ of the circulatory system, and its muscular walls—comprised exclusively of cardiac muscle—enable efficient blood flow. The other choices refer to locations not directly associated with cardiac muscle tissue. Lungs contain respiratory tissues, the stomach is lined with smooth muscle for digestion, and while muscle tissue exists throughout the body, only skeletal and smooth muscles are found in those areas, with cardiac muscle strictly located in the heart. Thus, the specificity of the heart as the only location for cardiac muscle tissue makes this answer accurate.