Consider the following statements regarding skeletal system.
a. The facial region consists of 14 bones.
b. There are 12 lumbar and 7 thoracic vertebrae in our vertebral column.
c. There are two pairs of vertebrochondral ribs.
d. Each limb is made of 30 bones.
Choose the option that mention only correct statements.
Solution:
Let's analyze each statement:
a. The facial region consists of 14 bones. This statement is correct. The human skull has 14 facial bones.
b. There are 12 lumbar and 7 thoracic vertebrae in our vertebral column. This statement is incorrect. In the human vertebral column, there are typically 12 thoracic vertebrae and 5 lumbar vertebrae.
c. There are two pairs of vertebrochondral ribs. This statement is incorrect. Vertebrochondral ribs (also known as false ribs) are the 8th, 9th, and 10th pairs of ribs, which means there are three pairs, not two.
d. Each limb is made of 30 bones. This statement is correct. Each upper limb (arm) consists of 30 bones (humerus, radius, ulna, 8 carpals, 5 metacarpals, and 14 phalanges). Similarly, each lower limb (leg) also consists of 30 bones (femur, patella, tibia, fibula, 7 tarsals, 5 metatarsals, and 14 phalanges).
Therefore, only statements 'a' and 'd' are correct.