Question

Obturator foramen is found in:
A. Pectoral girdle of rabbit
B. Pectoral girdle of frog
C. Pelvic girdle of rabbit
D. Pelvic girdle of frog

Answer 1

Hint: Obturator foramen is the opening which is found in the pelvic girdle. The pelvic girdle is formed of three bones: ilium, ischium and pubis. These bones fuse together to form an opening known as the obturator foramen. It is the site at which the hindlimbs are attached to the hip.

Complete answer:
To know the correct answer to the question, we must be well aware of the obturator foramen.
The Pelvic girdle is divided into the right half and the left half. Each half has three bones, making it a total of six bones altogether.
The obturator foramen is the opening in the pelvic girdle through which the nerves and the blood vessels pass. It is the site at which the hindlimbs are attached to the hips in humans. The tuberosity present on the ilium and the acetabular notch converts into the Obturator foramen in rabbit.

Since now we are well aware of the Obturator foramen, therefore, the correct answer to the question is option C i.e. the pelvic girdle of rabbit.

Note: Here it must be noted that the two obturator foramen in both the left and the right halves in humans is joined by pubic symphysis. Further, the largest bone in the pelvic girdle is the ilium. Ilium alongwith the ischium and pubis surround the obturator foramen.