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An acromion process is characteristically found in the -
A
Skull of frog
B
Sperm of mammals
C
Pelvic girdle of mammals
D
Pectoral girdle of mammals
Detailed Solution
Each half of the pectoral girdle of mammals consists of a clavicle and a scapula.
The scapula is a large, flat, triangular bone on the dorsal side of the thorax.
It has a slightly elevated ridge called the spine, which projects as a flat, expanded process called the acromion.
The clavicle articulates with this acromion.
Below the acromion is a depression called the glenoid cavity, which articulates with the head of the humerus to form the shoulder joint.
The acrosome (not acromion) is the cap-like structure on the head of a sperm.
So the acromion process is found in the pectoral girdle of mammals.
The scapula is a large, flat, triangular bone on the dorsal side of the thorax.
It has a slightly elevated ridge called the spine, which projects as a flat, expanded process called the acromion.
The clavicle articulates with this acromion.
Below the acromion is a depression called the glenoid cavity, which articulates with the head of the humerus to form the shoulder joint.
The acrosome (not acromion) is the cap-like structure on the head of a sperm.
So the acromion process is found in the pectoral girdle of mammals.