Q. Bone ossification test is conducted to ascertain human—
A. Brain efficiency
B. Tentative age
C. Tentative height
D. Drug addiction
Bone formation, also called ossification, process by which new bone is produced.Ossification begins about the third month of fetal life in humans and is completed by late adolescence. The cartilage cells die out and are replaced by osteoblasts clustered in ossification centres.
With ossification test of bone tentative age can be ascertained.
B. Tentative age
C. Tentative height
D. Drug addiction
Answer: Tentative age
Timetable for human ossification
Time period | Bones affected |
---|---|
Third month of fetal development | Ossification in long bones beginning |
Fourth month | Most primary ossification centers have appeared in the diaphyses of bone. |
Birth to 5 years | Secondary ossification centers appear in the epiphyses |
5 years to 12 years in females, 5 to 14 years in males | Ossification is spreading rapidly from the ossification centers and various bones are becoming ossified |
17 to 20 years | Bone of upper limbs and scapulae becoming completely ossified |
18 to 23 years | Bone of the lower limbs and os coxae become completely ossified |
23 to 25 years | Bone of the sternum, clavicles, and vertebrae become completely ossified |
By 25 years | Nearly all bones are completely ossified |
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