ductless gland. [duktâ²les] a gland lacking an excretory duct, such as an endocrine gland, that secretes hormones directly into blood or lymph. ductless gland. A gland with cells that secrete specific molecules into the adjacent interstitial space (paracrine glands) or into the blood stream (endocrine glands).
Cast. 1  Michael Weatherly as Dr. Jason Bull. 2  Freddy Rodriguez as Benny ColÃ³n. 3  Geneva Carr as Marissa Morgan.  Christopher Jackson as Chunk 1  Palmer. Jaime Lee Kirchner as Danny James.  Annabelle Attanasio as Cable McCrory.
Show Summary. From series creator and executive producer Michael S. Chernuchin (Law & Order, Brooklyn South), comes TNT's first ever original series. Bull is the story of a group of young wall street investment bankers and stock traders who leave an established firm to strike out on their own. Latest News.