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 Reference Ranges for Thyroid Lab Tests. The diagnosis of a hyperactive or hypoactive thyroid is confirmed by a physical examination and laboratory tests. The thyroid test measures the levels of T3, T4, and TSH. Learn about these hormones and know what the normal thyroid lab test reference range is. 1  slide 1 of 4. The Thyroid Gland The thyroid gland is part of the endocrine system and is located in the front of the neck. 2  slide 2 of 4.