What is the approximate weight of thymus gland at pubey?
**Core Concept**
The thymus gland is a vital organ responsible for the development and maturation of T-lymphocytes, playing a crucial role in the immune system. Its weight and development are closely related to the individual's age and stage of life, particularly during puberty.
**Why the Correct Answer is Right**
During puberty, the thymus gland undergoes significant changes, resulting in a decrease in its weight. This is due to the rapid growth and maturation of the individual, leading to a corresponding decrease in the gland's size and weight. The thymus gland typically reaches its maximum weight at around 5-7 years of age and then gradually decreases in size until adulthood. This decrease is largely due to the involution of the gland, where the thymic epithelial cells undergo apoptosis, leading to a reduction in the gland's overall weight.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as the thymus gland does not typically increase in weight during puberty; instead, it decreases in size.
**Option B:** This option is incorrect as the thymus gland's weight is not directly related to the individual's height; its weight is more closely related to age and stage of development.
**Option C:** This option is incorrect as the thymus gland's weight is not typically at its maximum during puberty; it is actually at its maximum weight at around 5-7 years of age.
**Clinical Pearl / High-Yield Fact**
The thymus gland's involution during puberty is a normal process, and its decrease in size is not typically a cause for concern. However, significant involution or atrophy of the thymus gland can be indicative of certain underlying conditions, such as autoimmune disorders or infections.
**Correct Answer:** C. **15 grams**