A bed bug has two tubes on its mouth which are inserted in the host. Among the list of two tubes inserts saliva in to the host and another attracts blood. Feeding lasts for about 5 minutes. A bed bug prefers to feed on blood every five to 10 times, https://daltondpblw.articlesblogger.com/52967493/the-basic-principles-of-how-many-calorie-in-an-apple