The type of respiration which does NOT involve blood is the

Explanation

Tracheal respiration in cockroaches involves a system of air-filled tubes called tracheae that deliver oxygen directly to cells, bypassing the need for blood to transport gases. This is unlike pulmonary, cutaneous, and bucco-pharyngeal respiration, which all involve the circulatory system to circulate oxygen and carbon dioxide throughout the body. In pulmonary respiration, lungs are involved; in cutaneous respiration, gases diffuse through the skin; and in bucco-pharyngeal respiration, the lining of the mouth is used for gas exchange, all of which rely on blood as a transport medium.