What is the function of the upper limb bones?
Thirty bones in total make up the structure of the upper extremity. They act as a framework for the muscle, blood vessels, nerves and lymphatics to work upon. There is one bone in the upper arm region, the humerus. The forearm contains two bones, the radius and the ulna.
What are the functions of the upper and lower limb?
The upper limb and lower limbs were evolved basically for bearing the weight of the body and for locomotion. In quadrupeds forelimbs and hindlimbs are, therefore, built on the same basic pattern. Each limb is made up of a basal segment or girdle, and a free part divided into proximal, middle and distal segments.
What are the main bones of the upper limb?
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. The base of the hand contains eight bones, each called a carpal bone, and the palm of the hand is formed by five bones, each called a metacarpal bone.
What are the functions of the lower limbs?
The robust bones of the lower limb support the weight of the upper body, facilitate locomotion, and contain strong, stable joints. tibia form the knee joint; the distal end of the tibia and fibula form part of the ankle joint.
How many bones are in upper limbs?
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.
How many bones make up the upper limb?
What is the difference between upper limb and lower limb?
In the humans, the gross difference in the upper and lower limbs is that the flexor and extensor surfaces and their functional groups of muscles are in the opposite directions i.e. flexor surfaces or muscles in the upper limbs are placed anteriorly whilst in the lower limbs, it is the extensor surfaces or group of …
How many bones are there in upper limb?
How many bones are in your upper limb?
How many muscles are in your 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.
How do the bones of the upper limb articulate?
The distal end of the humerus has two articulation areas, which join the ulna and radius bones of the forearm to form the elbow joint. The more medial of these areas is the trochlea, a spindle- or pulley-shaped region (trochlea = “pulley”), which articulates with the ulna bone.
What are limbs What are their functions?
A limb (from the Old English lim), or extremity, is a jointed bodily appendage that humans and many other animals use for locomotion such as walking, running and swimming, or for prehensile grasping or climbing. In the human body, arms and legs are commonly called upper limbs and lower limbs, respectively.
What is limb bone?
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 is the heaviest strongest bone in the body?
The femur bone is the longest and strongest bone in the body. Located in the thigh, it spans the hip and knee joints and helps maintain upright posture by supporting the skeleton.
How many bones are in upper limb?
How many joints are in the upper limb?
6 main
The upper limb has a wide range of precise movements associated with it to allow us to effectively interact with our environment, the 6 main joints covered here (from proximal to distal) are the sternoclavicular, acromioclavicular, shoulder, elbow, radioulnar, and wrist joints.