Thyroid Gland Hack vicw Thyroid follicle Follicula Follicularcell follicles C: parafollicular cell
Thyroid Gland Follicular cell follicles C: parafollicular cell
Found at 2nd through 4th cartilages of the trachea v Small gland with four parathyroid glands attached to the posterior surface v Follicles are the structural unit of the gland v Follicle consists of a wall of simple cuboidal epithelium cells inclosing a space containing a jelly like substance called colloid if the colloid distends the follicles, the epithelial cells can become flattened almost like simple squamous. Colloid combines with iodine to form thyroid hormones -regulate body metabolism
✓Found at 2 nd through 4 th cartilages of the trachea ✓Small gland with four parathyroid glands attached to the posterior surface. ✓Follicles are the structural unit of the gland. ✓Follicle consists of a wall of simple cuboidal epithelium cells inclosing a space containing a jellylike substance called colloid. If the colloid distends the follicles, the epithelial cells can become flattened almost like simple squamous. Colloid combines with iodine to form thyroid hormones – regulate body metabolism
Follicles(simple cuboid /culumnar epi )+fenestrated capillary Follicular cell t basal lamina lodination of Follicular cell: t3, t4 Parafollicular cell calcitonin 0°g lodide oxidation T3, T4 Follicular cel T3,T4 Amino acids lodide Capillary lumen
Follicles(simple cuboid/culumnar epi.) + fenestrated capillary Follicular cell + basal lamina Follicular cell: T3, T4 Parafollicular cell: calcitonin Follicular cell
Colloid Between the follicles are located small groups of parafollicular cells which secrete hormone thyrocalcitonin or often called just calcitonin Calcitonin functions to reduce calcium levels in Follicular cells the blood by actively reducing breakdown of bone and inhibiting re absorption of calcium in Blood Blood digestive system capillary Parafollicular
Between the follicles are located small groups of parafollicular cells which secrete hormone thyrocalcitonin or often called just calcitonin. Calcitonin functions to reduce calcium levels in the blood by actively reducing breakdown of bone and inhibiting reabsorption of calcium in digestive system
arafollicular cell B
parafollicular cell