Zoology MCQs for NEET — Practice Questions with Answers

Cranium: They are 8 in number. They form the hard protective outer covering, cranium for the brain.

Skull:  The skull is composed of two sets of bones –cranial and facial, that totals to 22 bones.

Face: The facial region is made up of 14 skeletal elements which form the front part of the skull.

Hind limb: Each limb is made of 30 bones.

Ribs: There are 12 pairs of ribs.

(page- 310)

The skull region articulates with the superior region of the vertebral

column with the help of two occipital condyles, thus it is referred to as

dicondylic skull.

(page-309, 310)

Our vertebral column is formed by 26 serially arranged units called vertebrae and is dorsally placed.

(page-310)

The vertebral column is differentiated into cervical (7), thoracic (12), lumbar (5), sacral (1-fused) and coccygeal (1-fused) regions starting from the skull.

(page-310)

Each rib is a thin flat bone connected dorsally to the vertebral column and ventrally to the sternum. It has two articulation surfaces on its dorsal end and is hence called dicephalic

(page-310)

True ribs: First seven pairs of ribs are called true ribs.

False ribs: The 8th, 9th and 10th pairs of ribs do not articulate directly with the sternum but join the seventh rib with the help of hyaline cartilage. These are called vertebrochondral (false) ribs.

Floating ribs:  Last 2 pairs (11th and 12th) of ribs are not connected ventrally and are therefore, called floating ribs.

(page-310)

The bones of the limbs alongwith their girdles constitute the appendicular

skeleton.

1. Shoulder girdle: 2 clavicle + 2 scapula
2. Pelvis bones: 2
3. Arms and forearms: 6 (2X humerus, ulna and radius)
4. Bones in hands: 54 (16 carpals, 10 metacarpals, 28 phalanges)
5. Bones in legs: 8 (2X femur, tibia, patella, fibula)
6. Bones in feet: 52 (14 tarsals, 10 metatarsals, 28 phalanges)

(page-311)

The bones of the hand (fore limb) are humerus, radius and ulna one each, carpals (wrist bones – 8 in number), metacarpals (palm bones – 5 in number) and phalanges (digits – 14 in number).

(page-311)

The dorsal, flat, triangular body of scapula (pectoral girdle) has a slightly elevated ridge called the spine which projects as a flat, expanded process called the acromion.

(page-311)

Each half of pectoral girdle consists of a clavicle and a scapula. Scapula is a large triangular flat bone situated in the dorsal part of the thorax between the second and the seventh ribs.

(page-311)