GENERAL HISTOLOGY

Detailed explanation-1: -The function of the thyroid gland is to take iodine, found in many foods, and convert it into thyroid hormones: thyroxine (T4) and triiodothyronine (T3). Thyroid cells are the only cells in the body which can absorb iodine. These cells combine iodine and the amino acid tyrosine to make T3 and T4.

Detailed explanation-2: -Iodine, as a trace element, is a necessary and limiting substrate for thyroid gland hormone synthesis. It is an essential element that enables the thyroid gland to produce thyroid hormones thyroxine (T4) and triiodothyronine (T3).

Detailed explanation-3: -The thyroid contains two hormones, L-thyroxine (tetraiodothyronine, T4) and L-triiodothyronine (T3) (Figure 2-1, below). Iodine is an indispensable component of the thyroid hormones, comprising 65% of T4’s weight, and 58% of T3’s.

Detailed explanation-4: -The thyroid gland releases triiodothyronine (T3) and thyroxine (T4). These hormones play an important role in regulation of your weight, energy levels, internal temperature, skin, hair, nail growth, metabolism and is an important part of the endocrine system.

Detailed explanation-5: -Apart from the essential trace element iodine, which is the central constituent of thyroid hormones, a second essential trace element, selenium, is required for appropriate thyroid hormone synthesis, activation and metabolism.