Question

Explain the structure of striated muscle tissue.

Answer 1

Hint: Muscles are an important structure found in the human body system that helps in providing movement and give support to the bone. The movement occurs in muscles through contraction and relaxation. They are of various types based on their structure and function.

Complete answer
Striated muscles- it is a high group of organized tissue that helps in the conversion of chemical energy to physical energy. Its primary function is to generate force and contract the muscles in order to support respiration locomotion and posture i.e skeletal muscle and also helps in the pumping of the blood to all the parts of the body i.e cardiac muscles.
-The striated muscles are mostly the skeletal muscles because when we observe these muscles in the microscope they appear like a striped structure and also show dark and light alternate striation or bands.
-When we have control over the movements of the muscles then those muscles are called the voluntary muscles. Striated muscles also come under the category of the voluntary muscles and skeletal muscles come under this group of muscles; they are under the control of humans as they move only when the brain sends signals to the body in the form of nerve impulses.
-The muscles undergo contraction for the fast and strong movements, the contraction helps the muscles to stretch and the muscles after contraction will again come to their original position and shape.

Additional information
Skeletal muscles are the muscle types that are a form of striated muscle tissues that are voluntary under the control of the somatic nervous system. They are attached to the bones by a bundle of collagen fibers which are known as tendons and are multiple bundles of cells joined together. These are known as muscle fibers which are surrounded by a connective tissue layer known as fasciae. They are composed of myofibrils which constitute actin and myosin filaments in repeated units known as sarcomeres which are the basic units of muscle fiber.
The muscles that are found in the heart are the cardiac muscles which are of three types. It comprises vertebrate muscles, skeletal muscles, and smooth muscles which are involuntary, striated muscles that constitute the walls of the heart. The outer layer of the heart wall which is known as the epicardium and the inner layer which is known as the endocardium constitutes a middle layer which is known as the myocardium.

Note:
Mainly living organisms show three types of the movement known as amoeboid, ciliary, and muscular. The activity of various systems includes the skeletal system, muscles system, and nervous system in the case of the animals must be coordinated so that the animals may undergo locomotion. Muscle fibers are made of Microfibrils which in turn are composed of Sarcomeres, which is the reason for the basic functioning of muscle i.e muscle contraction.