The ulna and scapula are parts of the human body. These bones and muscles are of course useful to help humans move.
If it does not have these bones, then humans will not be able to move freely. There are various bones in the human body with their respective functions.
Also Read: Understanding Compact Bones, Their Functions and Locations in the Body
Position and Function of the Stem and Lever
The human body can be formed perfectly because of the bones. In addition, the bones in the human body also have their own names.
One type is the cubit and the lever. The two bones have different functions and roles even though they are located close together.
However, because of their close proximity, many people think that these two bones are the same, even though they are very different.
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Ulna
This type of bone is in the human arm. The ulna is the forearm in the human hand.
The existence of this bone is to connect the human forearm with the upper arm.
Specifically, this bone is on the side where the little finger is.
The function of this bone is actually the same as the others. However, because it is in the hand, the ulna has its own role in hand movement.
Following are the functions of the ulna bone.
- Forms the structure of the forearm.
- Assists rotation of the wrist. The existence of this bone really helps the wrist to rotate so that the hand can move perfectly.
- Place of attachment of muscles that can move the hand.
- Forms the humerus and elbow joint. This happens because the joint in the elbow has an important role in stretching the hand and bending the arm.
- Storing mineral intake to support movement that occurs and also connects vital ligaments to all muscles in the body.
Also Read: Examples of hard bones, their functions, definitions and characteristics
Gathering Bone
Next, there is a bone in the shape of a pipe. In fact, the ulna and the lever are both in the human arm.
However, the size of the radius is shorter. The lever bone has two ends on the sides of the arm that are at the bottom.
The shape of this bone is quite strong and dense, but not all human lever bones can be formed perfectly. There are several factors that cause it, such as a disability that makes it shorter.
The following is a function of the lever bone.
- Compose the skeleton in the forearm which is part of the framework of the human locomotion or extremity.
- The lever bone is also a place for the muscles to attach to the arm.
- As a constituent of the forearm.
- The place for attachment of the biceps muscle that extends across the end of the upper arm. The lever and bicep muscles work to lift objects up.
- Helps move the wrists.
Although both are located in the arm, the ulna and the lever have their respective roles for the body. (R10/HR-Online)
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