Porphyra also contains phycoerythrin, which is a red pigment. suggest a reason for phycoerythrin being absent from the porphyra chromatohgram

Air goes past the epiglottis and into the trachea when you breathe in. from there, it goes to your vocal cords in the larynx until it reaches the bronchi. from the bronchi, air passes into each lung.