How Skeletal Muscles Make The Body Move

Bones are joined together to allow different kinds of movement.But did you know that, without muscles, bones cannot move at all?

Muscle-bone connection . Touch the back of your foot just above the heel.Do you feel a tough cord of tissue inside? This tough cord is the tendon that connects your calf muscle to your heel bone.Clench your fist.Do you see the tendons in your wrists? Bend and extend your fingers.Do you notice the tendons moving? The bending and extension of your fingers are controlled by the tendons.

These tendons attach the muscles of your forearm to your finger bones.

Tendons are bundles of tough fibers that attach muscles to bones.One end of a tendon comes from the end of a muscle while the other end is attached to a bone.Some tendons are round while others are flat.Tendons also differ in length and thickness.

How muscles move bone .The muscles that move bones are skeletal muscles.Skeletal muscles perform different functions.Muscles move by contracting or becoming shorter.Contraction of muscles requires energy.Energy comes from food.Bend your elbow and touch the muscle in your upper arm.Does it feel hard or soft? Straighten your elbow and feel the muscle again.Does it feel the same as before? When a muscle feels hard, it is contracted when it feels soft, it is relaxed.

How muscles makes the arm move . To bend the elbow, the biceps muscles contracts while the triceps muscle relaxes.The contraction of the biceps muscle pulls the lower arm bone upward.To straighten the elbow, the same muscles work but in the opposite way the biceps relaxes while the triceps contracts to pull the arm bone down.

The forearm can turn 180 degree without turning the upper arm.The two bones in the forearm are alongside each other.When the muscles of the forearm contract, the hand and forearm turn so that the palm faces downward.This time, the position of the bones are changed.Instead of being alongside each other, the radius now crosses over the ulna.

Skeletal muscles work in pairs . When one muscle contracts, the other relaxes.Muscles always pull.They never push.We can move our body in different ways while we work or play.In all these movements, our bones and muscles move in a coordinated way.

Here are other skeletal muscles and the work they do.

1.Muscles in the head are used for talking, moving the eyes, making facial expressions and chewing.

2.Muscles in the neck move the head and keep it upright.

3.Shoulder muscles lift the arm.

4.Chest muscles pull the arm forward and across the body.

5.Thigh muscles raise and lower the leg.They also bend and straighten the knee.

6.Muscles of the leg control the movement of the ankle, foot and toes.

note: originally posted at Exposeknowledge.com under the same author.

Article Written by joeldgreat

Where I belong...New ways to contribute to humanity by posting relevant blogs and articles. Back from the grave..


Post Your Comment

Related Articles

  • Hydrospheric Movements Of The Ocean

    Have you ever read a story about shipwrecked sailors on a small, uninhabited island? Rescuers finally came because a message was placed in a bottle and thrown into the sea. The bottle was picked up months later, thousands of kilometers away. The waves were supposed to have carried the bottle to distant chores.

  • Common Daily, Weekly And Occasional Household

    Responsible family members should perform some task daily, weekly, or occasionally to maintain cleanliness and orderliness in the home. A workplace prepared and followed regularly makes housekeeping easier and lighter.

    Common Daily Household Tasks

    Daily household tasks include dusting the furniture, cleaning the toilet, bedroom, living room, dining room, kitchen, and bathroom, keeping family items in their proper places, and sweeping the floor and yard. Waste baskets and trash cans must be emptied.

  • Muscle Injuries And Diseases

    Muscles become injured when they are outstretched, torn or bruised due to accidents. They may also be affected by some diseases. What are these injuries and diseases?

    Muscle Injuries

    Strain. Strain is the tearing or stretching of muscle fibers when they are suddenly pulled apart too far. Sometimes there is a bleeding in the affected area which causes pain and swelling. To treat a train, apply an ice pack to the affected area. Analgesics may be taken to relieve pain. Analgesics are drugs that are used to treat pain.

  • Earth Land Forms And Bodies Of Water

    The land is a part of the earth's surface. Earths surface is uneven due to the different types of landforms . What are these landforms?

    1. A plain is a large area of a low flatland. Most people build their homes her. Schools, factories and other big buildings are also found on a plain. A plain is also good for farming. Farmers grow different crops on a plain.

  • Understanding The Difference Between Network And Internet Technicians

  • Describing The Components Of An Ecosystem

    The environment is everything that is around us. Some parts of the environment are alive. Others were once alive. Human beings, animals, plants and other organism are parts of the living environment. Some parts of the environment are not alive. Sunlight, air , water and minerals are parts of the nonliving or physical environment.

    The study of relationships between organisms and their environment is known as ecology. Scientist who studies ecology is called ecologists.

  • How To Survive The College Life

    College life can be tough. Here is some of my tips on how to survive it.

  • How Other Body Organs Remove Body Waste

    The body gets rid of waste substances not only through the kidneys but through other organ, too. What are these organs?

    Lungs. The lungs are respiratory organs. But they are also excretory organs. When you exhale, carbon dioxide and water vapor come out. Blood delivers food and oxygen to all the body cells. In the cells, oxygen combines with food to produce energy. Carbon dioxide and water are produced as waste during the process. Carbon dioxide and water are absorbed into the blood and carried to the lungs where they are removed during exhalation.

  • Brief History Of Science And Technology

    Our ancestors fashioned their tools from metals even before the science of metallurgy was know. Early people produced and drank wine, and used cosmetics even before the process of fermentation and the science of cosmetology were known and develop.

    During early days, science and technology were separated from each other. Science belonged to philosophers while technology belonged to the tanners, millers, and silversmiths.

  • Putting Up A Cooperative Store

    Families who are looking for livelihood opportunities to increase their family income can join or form a cooperative in the community. Among the classes of the cooperatives which are easy to put up and manage is a cooperative.

    A cooperative store is put up and serves the needs of families in the community, especially those with low income. To put up a cooperative store, a temporary leader calls a meeting of all those interested in forming a cooperative. They discuss at the meeting the main objectives and purposes of the cooperative to be put up.