Thyroid gland

Parafollicular cells or C cells are located both in the interfollicular connective tissue and within the basal lamina of the follicular epithelium (seen here). These cells are separated from the thyroglobulin by processes from adjacent follicle cells extending over the parafollicular cells.  Parafollicular cells have a pale cytoplasm with secretory granules containing calcitonin.  Calcitonin secretion lowers, and is regulated by, blood calcium levels.  1000x

Parafollicular cells or C cells are located both in the interfollicular connective tissue and within the basal lamina of the follicular epithelium (seen here). These cells are separated from the thyroglobulin by processes from adjacent follicle cells extending over the parafollicular cells.  Parafollicular cells have a pale cytoplasm with secretory granules containing calcitonin.  Calcitonin secretion lowers, and is regulated by, blood calcium levels.  1000x

Parafollicular cells or C cells are located both in the interfollicular connective tissue and within the basal lamina of the follicular epithelium (seen here). These cells are separated from the thyroglobulin by processes from adjacent follicle cells extending over the parafollicular cells.  Parafollicular cells have a pale cytoplasm with secretory granules containing calcitonin.  Calcitonin secretion lowers, and is regulated by, blood calcium levels.  1000x

Parafollicular cells or C cells are located both in the interfollicular connective tissue and within the basal lamina of the follicular epithelium (seen here). These cells are separated from the thyroglobulin by processes from adjacent follicle cells extending over the parafollicular cells.  Parafollicular cells have a pale cytoplasm with secretory granules containing calcitonin.  Calcitonin secretion lowers, and is regulated by, blood calcium levels.  1000x