Question

The given diagram shows, the upper arm with its muscles. Which of the following shows the correct labeling of P, Q, and R?

Answer 1

Answer:

P is upper bone.

Q is back muscle.

R is lower bone.

Answer 2

In the given diagram, the labelled parts of the upper arm with its muscles are -

P - JOINT

Q - MUSCLE

R - BONE

Explanation

ANATOMICAL STRUCTURE OF UPPER ARM -

• The limbs are classified under the appendicular skeletal system.
• The bones in the upper arm are the scapula, clavicle, and humerus.

1. Scapula - Triangular flat bone that attaches the arm to the torso by muscles.
2. Clavicle - Collar bone that helps in force distribution in the upper body parts.
3. Humerus - Long bone in between scapula and elbow joint.

• The upper arm comprises of shoulders and region between the shoulder joint and elbows joint.
• An upper arm has different joints present -

                             Ball and socket joint - Shoulder joint

                             Hinge joint - elbow joint.

• The forearm consists of radius and ulna that are connected to the humerus by the elbow joint.
• Muscles provide structural support to the body by connecting one part with another part.
• Muscles in the upper part of the arm are - pectoralis major, latissimus dorsi, deltoid, and rotator cuff.
• These muscles help in the movement of the upper arm.