Question

What are the main functions of muscle?

Answer 1

- Smooth, cardiac, and skeletal muscles are the three types of muscles.
- Our bodies contain over 600 muscles which account for around 40% of the body weight.
- Muscle fibres are special cells that make up muscles.

Complete answer:
We all know that muscle is a form of soft tissue that can be found in both humans and animals. muscle is made up of actin and myosin protein filaments that slide past each other in muscle cells, causing contraction and changing the cell's length and shape.

Functions of different types of muscles-
Our muscular system assists in body movement, posture maintenance, and blood circulation. Skeletal, respiratory, and smooth muscles make up the muscular system of the human body.
i) Skeletal muscles- The skeletal muscles' primary purpose is to produce voluntary motions such as walking, standing, playing, chewing, and blinking. Skeletal muscles contract in response to stimuli as well.
ii) Cardiac muscles- Heart muscle contractions are involuntary and regulated by the heart's electrical system. The heart's muscles are in charge of pumping blood from the heart into the lungs to soak up oxygen, then collecting blood from the lungs and pumping it to the body's numerous arteries.
iii) Smooth muscles- These are found in the stomach which intestines aid with digestion by processing food. The stomach and intestines contract involuntarily to aid the digestion and movement of food through the digestive tract. The smooth muscles in the arteries relax and contract to help pump blood and maintain blood pressure in the circulatory system.

Note:
- The heart is the body's hardest-working muscle.
- The smallest muscles in the body, as well as the smallest bones, are found in the ear.
- Muscles work to generate force and motion. They are largely in charge of posture maintenance and change. Muscles' primary duty is to contract in order to move the body as a whole or to move materials around the body.