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.
Normal Thyroid Levels for TSH. Thyroid function is measure base of the TSH range of TSH blood test. The normal thyroid levels for TSH used to be from 0.5 to 5.0. After clinical studies, in 2003, the TSH range has been revised to 0.3 - 3.0 as normal TSH levels.