Lymphoid tissues such as lymph nodes are:
a. Adult size by age 1 year.
b. Adult size by age 13 years.
c. Half their adult size by age 5 years.
d. Twice their adult size by age 10 to 12 years.
ANS: D
Lymph nodes increase rapidly and reach adult size at approximately age 6 years. They continue growing until they reach maximal development at age 10 to 12 years, which is twice their adult size. A rapid decline in size occurs until they reach adult size by the end of adolescence.
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