Respiratory organs present in human being: Nasal Cavity: Nasal Cavity is a hollow structure partitioned into two nasal chambers by the nasal septum. It is composed of cartilage, bone, connective tissue and muscles. There are pairs of openings situated at the anterior and posterior ends of the nasal chambers. The anterior nostrils lead to the nasal cavity. Pharynx: It is a vertical tube which extends between the cranial base (above the level of the soft palate) and middle of the neck. It has three parts- nasopharynx, oropharynx and laryngopharynx. The nasopharynx is the upper part that lies above the level … Continue reading Write the names of the respiratory organs present in human being. Explain them briefly.