Types of neuroendocrine tumors. Various types of neuroendocrine tumors can occur in many places in the body and grow differently. Many NETs first appear in the lungs or the gastrointestinal tract, including the stomach, pancreas, appendix, intestines, colon and rectum. NETs may also appear in the thymus, thyroid gland, adrenal gland and pituitary gland.
Ricin is a type of biological toxin that is predominantly derived from the bean of the castor plant. Log in to see link for more information. Ricin is a type of biological toxin that is predominantly derived from the bean of the castor plant. Log in to see link for more information.
1 A toxin is a highly toxic protein produced by certain plants, animals or pathogenic bacteria. 2  Examples include snake venom and anthrax. 3  All toxins are toxicants, but only those toxicants produced by living organisms are toxins. 4  Substances that are toxic only to specific types of cells or organs are called cytotoxins.