Question

A deltoid ridge occurs in
A. Radius
B. Ulna
C. Femur
D. Humerus

Answer 1

Hint: Bones are a rigid organ that forms the vertebrates skeleton in animals. It protects the different organs of the body. Bones are made up of calcium phosphate and calcium carbonate. Bones allow the movement of the body. Deltoid ridges are the significant points of muscle attachment. They extend from the greater tubercle down the lateral edge of the bone.

Complete answer:
-Humerus, radius, ulna, carpals, metacarpals, and phalanges form the forelimb.
-The longest bone is the humerus present in the upper arm.
-The humerus is situated between the shoulder and the elbow joint.
-Deltoid ridge is the roughly triangular area on the front side surface of the middle of the humerus.
-To the deltoid ridge, the deltoid muscle is attached.
-Thus, a deltoid ridge takes place in the humerus.
-Radius and ulna are the two large bones of the forearm.
-The femur is a thigh bone which is the strongest and longest bone in the body.

Hence, the correct answer is option (D).

Additional information:
-Humerus connects the two bones of the forearm(radius and ulna) and the scapula.
-This bone forms the upper arm.
-Humerus has three sections: a proximal end, a shaft, and a distal end.
-The humerus bone is an attachment to thirteen muscles which help in the movements of the hand and elbow.

Note: The deltoid ridge is the ridge on the humerus where the deltoid muscle is attached. Development of deltoid tuberosity occurs in a two-phase process through endochondral ossification. Deltoid muscle plays a significant role in the movement and stability of the upper arm and shoulder joint. Under the deltoid muscle, the axillary nerve runs and travels from posterior to anterior. Deltoid ridge of the humerus is only for the attachment of muscles.