Muscular tissue is responsible for the movement of our body. It is a specialized type of tissue that is composed of muscle cells or muscle fibers. Muscles play a crucial role in various types of movement, including voluntary and involuntary movements.

Muscle cells are elongated and possess the ability to contract and relax, which allows them to generate force and produce movement. These contractions are responsible for the movement of body parts, such as limbs, facial expressions, and even the beating of the heart.

There are three types of muscular tissue in the human body:
1. Skeletal Muscle Tissue: This type of muscle tissue is attached to the skeleton and is responsible for voluntary movements. It allows us to perform activities like walking, running, and lifting weights. Skeletal muscles are under conscious control and can be contracted and relaxed at will.

2. Smooth Muscle Tissue: Smooth muscle tissue is found in the walls of internal organs, such as the digestive system, blood vessels, and respiratory system. It is responsible for involuntary movements, such as peristalsis (contractions of the digestive tract) and regulating blood flow. Smooth muscles are not under conscious control.

3. Cardiac Muscle Tissue: Cardiac muscle tissue is found only in the heart. It is responsible for the contraction and relaxation of the heart, which allows it to pump blood throughout the body. Similar to smooth muscles, cardiac muscles are involuntary and not under conscious control.

Muscles work in pairs or groups to produce movement. When one muscle contracts, its counterpart relaxes, allowing for coordinated movement. This is known as antagonistic muscle action.

In summary, muscular tissue is responsible for the movement of our body. It allows us to perform voluntary activities, such as walking and running, as well as involuntary actions, such as the beating of the heart and digestion. Different types of muscular tissue have different functions and locations within the body, but they all play a vital role in facilitating movement.