Question
Which of the following statements are correct with reference to human endoskeleton?
A. Human skull is monocondylic.
B. The joint between any two adjoining vertebrae is a cartilaginous joint.
C. In human beings, the number of cervical vertebrae is seven.
D. All ribs except the last 2 pairs are bicephalic.
E. The occipital bone of skull is articulated with atlas vertebra.
Choose the correct answer from the options given below:
Options
Solution
Sol. [Key Concept: Human endoskeleton — axial and appendicular]
A. Incorrect: Human skull is dicondylic. The skull region articulates with the superior region of the vertebral column (Atlas) with the help of two occipital condyles.
B. Correct: The joint present between the adjacent vertebrae of vertebral column is cartilaginous joints.
C. Correct: There are 7 cervical vertebrae in human beings.
D. Incorrect: All ribs of humans are bicephalic, i.e., they have two articulation surfaces on their dorsal end.
E. Correct: The occipital bone of the skull articultes with the atlas vertebra via occipital condyles, forming the atlanto-occiptal joint.
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