Negative growth is a characteristic of:

 # Negative growth is a characteristic of:

A. Testis

B. Brain

C. Mandible

D. Thymus

The correct answer is D Thymus.

According to Scammon’s curves for growth, the growth of the neural tissues is nearly complete by 6 or 7 years of age. General body tissues, including muscle, bone, and viscera, show an S-shaped curve, with a definite slowing of the rate of growth during childhood and an acceleration at puberty. Lymphoid

tissues proliferate far beyond the adult amount in late childhood and then undergo involution at the same time that growth of the genital tissues accelerates rapidly. 

(From Scammon RD. The measurement of the body in childhood. In: Harris JA, ed. The Measurement of Man. Minneapolis: University of Minnesota Press; 1930.)