Given below are four matchings of an animal and its kind of respiratory organ : (A) Silver fish – Trachea (B) Scorpion – Book lung (C) Sea squirt – Pharyngeal slits (D) Dolphin – Skin The correct matchings are (a) (A) and (B) (b) (A), (B) and (C) (c) (B) and (D) (d) (C) and (D).
Option B Silver fish is an insect in which respiration occurs by tracheae. These communicate with the exterior by paired apertures, called spiracles. Respiratory system of scorpion consists of 4 pairs of book lungs that communicate with the outer air through stigma. In sea squirt, respiration occurs through pharyngeal slits. In dolphin, respiration occurs by lungs.
