ARM facts for kids

An arm is an upper limb of the body.

The word arm can mean different things, depending on how it's used. Most often, it refers to the upper part of a human or animal body. But it can also describe other things, like a symbol or a type of computer technology.

The Human Arm

Your arm is an important part of your body. It connects your shoulder to your hand. It's made up of bones, muscles, and joints that work together. This allows you to do many things, from lifting heavy objects to writing and drawing.

Bones of the Arm

Your arm has three main bones:

• The humerus is the long bone in your upper arm. It goes from your shoulder to your elbow.
• The radius and ulna are the two bones in your forearm. They stretch from your elbow to your wrist. The radius is on the thumb side, and the ulna is on the pinky finger side. These two bones can twist, which lets you turn your hand over.

Muscles and Joints

Muscles are attached to your bones and help them move. Some well-known arm muscles include:

• The biceps on the front of your upper arm helps you bend your elbow.
• The triceps on the back of your upper arm helps you straighten your elbow.

Your arm also has important joints:

• The shoulder joint is a ball-and-socket joint. It lets your arm move in many directions.
• The elbow joint is a hinge joint. It allows your arm to bend and straighten.
• The wrist joint connects your forearm to your hand. It allows your hand to move up, down, and side to side.

What Your Arms Do

Your arms are amazing tools! You use them every day for countless tasks, such as:

• Lifting and carrying: Picking up your backpack or carrying groceries.
• Reaching and grabbing: Getting something from a high shelf.
• Pushing and pulling: Opening a door or moving furniture.
• Fine motor skills: Writing, drawing, playing an instrument, or tying your shoes.

Other Meanings of "Arm"

The word "arm" can also refer to other things, not just a body part.

Coat of Arms

A coat of arms is a special design or symbol. Families, towns, or organizations use it to represent themselves. It's like a unique logo that tells a story about their history or values. You might see them on old buildings or official documents.

Armenia

Armenia is a country located in Western Asia. It's known for its ancient history and culture. Sometimes, "ARM" is used as a short code for Armenia, especially in international contexts. The Armenian language is the official language spoken there.

ARM Architecture

ARM architecture refers to a type of computer processor design. These processors are very common in devices like smartphones, tablets, and many modern computers. They are known for being energy-efficient, which helps batteries last longer.

See Also

In Spanish: ARM (desambiguación) para niños