Question

Mention three features of cardiac muscles.

Answer 1

Muscular tissue is a specialised tissue in animals that contracts to apply forces to various regions of the body. Muscle fibres are thin, elongated cells that make up the muscle. It is in charge of an organism's movement.
Sarcoplasm is the cytoplasm found in muscle fibres. It has a membrane network called the sarcoplasmic reticulum. Sarcolemma is the membrane that surrounds muscle fibres.
Properties of Muscular Tissue
Muscle Tissue Contractility is defined as the ability of muscle cells to contract forcefully.
A muscle's extensibility refers to its ability to be stretched.
Elasticity is the capacity of muscles to return to their normal length after being stretched.
Excitability– Muscle tissue responds to a motor neuron or hormone-induced stimulus.

Complete answer:
Cardiac muscles are situated in the heart and are responsible for performing muscular involuntary motions. They are self-stimulating, have an intermediate speed of contraction and energy requirement, and are self-stimulating.
Characteristics of cardiac muscles
Three characteristics of cardiac muscles are listed below:
Cardiac muscles are uncontrollable muscle groups. They are constantly contracting and relaxing in a cyclic pattern.
Cardiomyocytes are uninucleate, cylindrical, and elongated cells that make up the heart.
Cardiac muscles have faint cross-striations that do not become exhausted under normal conditions.
Cardiomyocytes (heart cells) have the ability to perform the contractile function of the heart, allowing blood to be pumped throughout the body. They have intercalated discs between the muscle fibres and are made up of branching fibres. The discs are darkly stained and positioned perpendicular to the muscle fibres. They have zigzag bands that cut through the muscle fibres.

Additional information:
The cardiac muscle's major purpose is to regulate the heart's functioning by relaxing and contracting the heart muscles.
The following are some of the other functions of cardiac muscles:
The cardiac muscles are the involuntary muscles of the body.
The cardiac muscles are also engaged in locomotion and movement.
The heart muscle’s function $24$ hours a day, $7$ days a week. They function automatically, causing the heart to contract in order for the heart to squeeze the blood vessels and then release, allowing the heart to refill with blood.
The heart contains “pacemaker” cells, which are a particular form of cardiac tissue. Electrical impulses from the neurological system cause them to constrict and expand.

Note:
Tissue of the Cardiac Muscle:
These can only be found in the heart.
The heart pumps blood by cardiac muscles’ contractions, which are involuntary muscles.
Cardiomyocytes are striated cells that make up the heart muscles.
They are uninucleated and single-celled.
Intercalated discs are the junctions that connect the ends of the cells. Desmosomes connect the cells to one another.