OVERVIEW OF THE IMMUNE SYSTEM
LYMPHATIC TISSUES AND ORGANS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
thymus
|
|
|
spleen
|
|
|
tonsil
|
|
|
Peter’s patches
|
Detailed explanation-1: -The thymus continues to grow after birth reaching the relative maximum size by puberty. It is most active in fetal and neonatal life. It increases to a mass of 20 to 50 grams by puberty. It then begins to decrease in size and activity in a process called thymic involution.
Detailed explanation-2: -The thymus produces and secretes thymosin, a hormone necessary for T cell development and production. The thymus is special in that, unlike most organs, it is at its largest in children. Once you reach puberty, the thymus starts to slowly shrink and become replaced by fat.
Detailed explanation-3: -The thymus gland is quite big in babies and children. It reaches its biggest weight of about 1 ounce during puberty. After puberty, it begins to shrink, and in older adults, it’s rather small.