Lipid Definition Lipids are class of naturally-occurring organic compounds that you may know by their common names: fats and oils. A key characteristic of this group of compounds is that they are not soluble in water.
Ultrasound. 1  normal thyroid gland has an homogenous appearance, the capsule may appear as a thin hyperechoic line. 2  each lobe normally measures 4 length: 4-7 cm. depth: <2 cm. 3  volume (excluding isthmus, unless its thickness is > 3mm) 6 10-15 ml for females. 12-18 ml for males.
The normal levels of the thyroid hormone in men as well as women are deemed to be between 0.5 mIU/L to 4.5 mIU/L. The normal levels of the thyroid hormone in infants are deemed to be between 3 mIU/L to 18 mIU/L. The abbreviation mlU/L represents milli-international units per liter.