Between ages 6 and 12,__________.
A) all 20 primary teeth are lost and replaced by permanent ones
B) boys lose their primary teeth slightly earlier than girls
C) the bones of the body shorten and narrow
D) children are unusually inflexible because their ligaments are tight

Question

Quizplus · Accepted Answer

Between ages 6 and 12, children typically lose all of their 20 primary teeth and they are replaced by permanent ones. This process is called “mixed dentition” and it usually starts around age 6-7, with the front teeth on the bottom and top being the first to fall out.

Between Ages 6 and 12,__________