Give three features of cardiac muscles.

There are three key features of cardiac muscle tissue:

1. Striated Appearance: Cardiac muscle tissue displays a striped appearance due to its organized contractile proteins, aiding in effective muscle contraction.

2. Involuntary and Rhythmic Contractions: Unlike skeletal muscles under voluntary control, cardiac muscles contract involuntarily and rhythmically to ensure continuous and steady pumping of the heart.

3. Intercalated Discs: Unique intercalated discs between cardiac muscle cells allow rapid communication. These discs contain gap junctions for quick electrical signaling and desmosomes for structural support, ensuring synchronized contractions for efficient heart function.

These features define cardiac muscle tissue, enabling its role as an involuntary and coordinated pump that sustains blood circulation throughout the body.