H-shaped, highly vascular gland: Has two lateral lobes (left and right) approx. 4cm long and 2cm wide Isthmus bridging them approx. 3cm wide and 2cm high 50% of people have a pyramidal lobe arising from the superior isthmus directed upwards or to the left Located in...
Functional unit of the thyroid is the follicle: Outer sphere of cuboidal epithelial cells (thyrocytes) and thin basement membrane: Site of thyroglobulin production Filled with a protein rich core called colloid: Made up of thyroglobulin a large glycoprotein Serves as...
Hormone Thyroxine (T4) - carries 4 iodine atoms) Triiodothyronine (T3) - carries 3 iodine atoms) Reverse-triiodothyronine (r-T3) - formed by peripheral conversion of T3 Calcitonin Function Regulation of metabolism and growth Metabolically inactive Regulation of...