MCX study material for all the peoples.Full description
Nebosh Study MaterialFull description
Allen Study Material Notes & MCQs Biology : Respiratory System 1. Skin effect is due to pattern of lines is called 1. Physical Process 2. Chemical Process 3. Physic Chemical Process 4. None 2. Larynx is modified portion of 1. Pharynx 2. Trachea 3. Bronchus 4. Lungs 3. Thoracic cavity is enlarged by contraction of 1. Internal intercostals muscles 2. Diaphragm 3. Lungs 4. All of above 4. Cartilaginous rings in trachea is incomplete at which surface 1. Dorsal 2. Ventral 3. Lateral 4. Ventrolatra 5.