A is producing more protein than B. Darker stain is produced by Haematoxylin which binds to nucleic acids and DNA/RNA the smaller circular feature is an arteriole. Evident by thick surrounding epithelium. One at bottom is vein. Red things inside are obviously red blood cells. Smooth muscle Skeletal muscle Cardiac muscle Abnormal thyroid: thicker epithelium due to greater cell proliferation stimulated by greater TSH levels. Lumen contains less colloid due to overuse. Patient would experience hyperthyroidism. Hyperplasia of follicules small dark purple stained structures: the nuclei of infiltrating immune cells.