What are the parts of upper limb?

The upper extremity or arm is a functional unit of the upper body. It consists of three sections, the upper arm, forearm, and hand. It extends from the shoulder joint to the fingers and contains 30 bones. It also consists of many nerves, blood vessels (arteries and veins), and muscles.

What is upper limb and its function?

The primary purpose of the upper limb is to move the hand around the body during the activities of life. The shoulder girdle provides a wide range of motion—exceeding a hemisphere–so that the hand may reach in all directions.

What is the basic structure of a limb?

The medial segment of the limb typically contains two bones: the radius and the ulna in the forelimb and the tibia and the fibula in the hind limb. In the forelimb the radius is anterior, or preaxial (i.e., its position is forward to that of the ulna), in the adjustment of the limb for support and locomotion on land.

What are the 3 parts of upper arm?

The upper arm includes the shoulder as well as the area between the shoulder and elbow joint….The bones of the upper arm include the:

• Scapula. The scapula is also called the shoulder blade.
• Clavicle. The clavicle is also called the collarbone.
• Humerus.

What is upper limb?

The upper limbs or upper extremities are the forelimbs of an upright-postured tetrapod vertebrate, extending from the scapulae and clavicles down to and including the digits, including all the musculatures and ligaments involved with the shoulder, elbow, wrist and knuckle joints.

How many bones are upper limbs?

There are 30 bones in each upper limb (see Figure 8.2). The humerus is the single bone of the upper arm, and the ulna (medially) and the radius (laterally) are the paired bones of the forearm.

How many bones are in upper limb?

Each upper limb is made up of 32 bones, and has a number of different regions. First, there’s the pectoral girdle, which consists of 2 bones: the scapula, also called the shoulder blade, and the clavicle, also known as the collarbone. Then there’s the arm, which only has one bone, called the humerus.

What is arm bone called?

Your arm is made up of three bones: the upper arm bone (humerus) and two forearm bones (the ulna and the radius).

How many muscles are in upper limb?

The muscles of the upper limb can be divided into 6 different regions: pectoral, shoulder, upper arm, anterior forearm, posterior forearm, and the hand. There are 4 muscles of the pectoral region: pectoralis major, pectoralis minor, serratus anterior and subclavius.

What are the 7 axial bones?

Vertebral Column

• Cervical vertebrae (7)
• Thoracic vertebrae (12)
• Lumbar vertebrae (5)
• Sacrum (1)
• Coccyx (1)

Why is it called humerus?

Etymology. The word “humerus” is derived from Latin: humerus, umerus meaning upper arm, shoulder, and is linguistically related to Gothic ams shoulder and Greek ōmos.

What is a humerus?

The humerus is the arm bone between your shoulder and your elbow. There are two types of humerus fractures based on the location of the break(s). Trauma from a fall or accident are often the cause of this type of fracture.

What are the 8 facial bones?

Facial Bones

• Maxilla (2)
• Zygomatic (2)
• Mandible (1)
• Nasal (2)
• Platine (2)
• Inferior nasal concha (2)
• Lacrimal (2)
• Vomer (1)

What is a ulna?

Introduction. The ulna is one of the two forearm long bones that, in conjunction with the radius, make up the antebrachium. The bone spans from the elbow to the wrist on the medial side of the forearm when in anatomical position. In comparison to the radius, the ulna is described to be larger and longer.

What is upper arm bone called?

The humerus — also known as the upper arm bone — is a long bone that runs from the shoulder and scapula (shoulder blade) to the elbow. Fractures of the humerus are classified in one of two ways: proximal humerus fracture or humerus shaft fracture.

What is carpal bone?

Your wrist is made up of eight small bones (carpal bones) plus two long bones in your forearm — the radius and the ulna. The most commonly injured carpal bone is the scaphoid bone, located near the base of your thumb.

What are the components of the upper limb?

The upper limb (upper extremity) is truly a complex part of human anatomy. It is best studied broken down into its components: regions, joints, muscles, nerves, and blood vessels. By looking at all of the upper limbs components separately we can appreciate and compartmentalize the information, then later view the upper limb as a whole

What are the upper limb muscles and movements?

Upper limb muscles and movements. 1 Scapular region. The scapular region lies on the posterior surface of the thoracic wall. It may seem strange that it is included in the anatomy of the 2 Shoulder. 3 Arm (brachium) 4 Forearm flexors. 5 Forearm extensors.

How many bones are in each upper limb?

There are 30 bones in each upper limb. The humerus is the single bone of the arm, and the ulna (medially) and the radius (laterally) are the paired bones of the forearm. The base of the hand contains eight carpal bones, and the palm of the hand is formed by five metacarpal bones. The fingers and thumb contain a total of 14 phalanges.

How do the nerves of the upper limb work?

The nerves of the upper limb arise from a complex arrangement of nerve fibers known as the brachial plexus; These nerves give sensation to our upper limb, as well as innervating the muscles, allowing us to move them at will.