During which stage of life is the thymus most active?  A. Pregnancy  B. Adolescence .  C. Infancy O  D. Reproduction

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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During which stage of life is the thymus most active? 
A. Pregnancy 
B. Adolescence . 
C. Infancy O 
D. Reproduction 

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Step 1

The thymus is a small gland of the lymphatic system which is located in the upper chest behind the breast bone. The main function of the thymus is in the generation and maturation of the T lymphocytes which help the immune cells to fight against diseases. It also produces hormones like thymulin and thymosin which regulate the production of the immune cells. 

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