CVS Practice Test 2025 – Complete Exam Preparation

There are three major types of cardiac muscle, which are essential for the functioning of the heart. These types include:

1. **Atrial Muscle**: This type of muscle is found in the atria of the heart, which are the upper chambers responsible for receiving blood from the body (right atrium) and the lungs (left atrium). The atrial muscle fibers enable contraction to push blood into the ventricles.

2. **Ventricular Muscle**: Located in the ventricles, this type of cardiac muscle is thicker and more powerful since its primary function is to pump blood out of the heart to the lungs (right ventricle) and the rest of the body (left ventricle).

3. **Specialized Cardiac Muscle**: This includes structures like the sinoatrial node (SA node) and the atrioventricular node (AV node), which are critical in regulating the electrical impulses that control the heart rate and coordinate the contraction of the heart chambers.

Understanding these three types and their distinct functions helps provide insight into cardiac physiology and the heart's operation as a whole. This knowledge is crucial for anyone preparing for exams related to cardiac function and anatomy.