This classification is based on the way these drugs are used for the treatment of a particular condition. Inotropic, Chronotropic and Dromotropic are different types of cardiac drugs. This classification is based on the way these drugs are used for the treatment of a particular condition. Inotropic drugs affect the force of cardiac contraction. Chronotropic drugs affect the heart rate. Dromotropic drugs affect conduction velocity through the conducting tissues of the heart.
ectoparasite noun a parasite which lives on the skin or outer surface of its host but feeds by piercing the skin. Compare endoparasite
ectoparasite, ectozoan, ectozoon, epizoan, epizoon - any external parasitic organism (as fleas) parasitic plant - plant living on another plant and obtaining organic nutriment from it. host - an animal or plant that nourishes and supports a parasite; it does not benefit and is often harmed by the association.