Question

5 Functions of Muscles​

Answer 1

Explanation:

Functions of Muscles:

1. Movement: Our body's skeleton gives enough rigidity to our body that skeletal muscles can yank and pull on it, resulting in body movements such as walking, chewing, running, lifting, manipulating objects with our hands, and picking our noses.
2. Maintenance of posture: Without much conscious control, our muscles generate a constant contractile force that allows us to maintain an erect or seated position, or posture.
3. Respiration: Our muscular system automatically drives movement of air into and out of our body.
4. Constriction of organs and blood vessels: Constriction or relaxation of blood vessels regulates blood pressure and blood distribution throughout the body.
5. Pumping blood: Blood moves through the blood vessels because our heart tirelessly receives blood and delivers it to all body tissues and organs.

Answer 2

Answer & Explanation:

What is the Muscular System?

The muscular system is an organ system, involved majorly in the movement of the body. There are nearly 700 muscles that are connected to the bones of the skeletal system, which roughly half make up the human’s body weight. Every muscle is a different organ made of blood vessels, skeletal muscle tissue, nerves, and tendons. Muscle tissues are found in the heart, blood vessels, and digestive system.

Muscular System and It's Functions

There are three kinds of muscle tissues, namely cardiac, visceral and skeletal.

Cardiac Muscle  

This muscle is present only in the Heart and responsible for supplying blood all over the body. It is also an involuntary muscle since it cannot be controlled. When the brain signals adapt the rate of contraction, the cardiac muscle triggers by itself to contract. The natural pace of the heart is composed of cardiac muscle tissue and triggers other cardiac muscle cells to shrink.

The cardiac muscle cells are straight which reveals that they seem to have dark and light stripes when seen under a microscope. The protein fibres arrangement within the cells is responsible for these dark and light stripes.

Visceral Muscle  

These muscles are found in the organs like intestines, blood vessels, and stomach. It is the weakest of all muscle tissues and causes contraction of organs to pass substances through the organ. It is said to be an involuntary muscle because it cannot be controlled directly by the conscious mind, but controlled by the unconscious part of the brain. It is also known as a smooth muscle since it has a uniform and a smooth appearance when observed under the microscope.

Skeletal Muscle  

It is the voluntary muscle tissue that can be controlled in conscious condition. All physical actions that a human performs (e.g. walking, writing) needs skeletal muscle. The skeletal muscle is responsible for moving the body parts that are connected to the bone.

Skeletal muscles from many ancestor cells combine themselves together to produce a straight, long fibre. These skeletal muscles are strong just like cardiac muscles. The name is derived from the known fact that these are connected to the skeleton in one region at least.