Page 1 Chapter 22 - Respiratory System For this assignment, please read the chapter and answer the questions below. Please type your answers in red or blue color. Please note that points may be deducted if answers are not submitted in these colors. Sentences in italics are meant to help you understand the material- they are not questions. Respiration: The primary function of the respiratory system is to obtain ___ oxygen ___ gas for cell metabolism and remove ___ carbon dioxide ___ waste. ( 2 points ) Describe each of the following general processes of respiration. ( 4 points ) Ventilation- air is moved into and out of the lungs, gases are commonly exchanged and refreshed. External respiration- oxygen diffuses from the lungs to the blood; carbon dioxide diffuses from the blood to the lungs. Gas transport- oxygen is transported from the lungs to the tissue cells and carbon dioxide is transported from the tissue cells to the lungs. Internal respiration- oxygen diffuses from blood to tissue cells and carbon dioxide diffuses from tissue cells to blood. Respiratory organs: The organs of the respiratory tract can be divided into two groups - the upper respiratory tract (nose, nasal cavity, sinuses, and pharynx) and the lower respiratory tract (larynx, trachea, bronchial tree, and lungs). Tables 22.1 and 22.2 in the textbook give a good overview of the respiratory system. Upper respiratory tract: Nose: The nose provides an entrance for air and has many internal __ vibrissae ___ for preventing large air particles from entering the nasal cavity. ( 1 point ) Nasal cavity: The nasal cavity is a space posterior to the nose that is divided medially by the nasal ____ nasal septum ____. ( 1 point ) BIO 202 –Chapter 22 assignment
Page 2 Nasal conchae: What is their function? (1 point ) They filter, heat, and moisten the air, and also reclaim heat and moisture in the inhaled air lessening the amount of moisture and heat released from the body when breathing. Cilia: ( 2 points ) Particles trapped in the mucus are carried to the ____ throat ____by ciliary action, swallowed, and carried to the ____ stomach ____ where gastric juice destroys any microorganisms in the mucus. Paranasal sinuses: (1 point ) What is their function? They lighten the skull and may help warm and moisten the air. The mucous they produce flows into the nasal cavity and the suctioning effect created by nose blowing helps drain the sinuses. Lower respiratory tract: Pharynx: ( 3 points ) The pharynx (throat) is a common passageway for both the ____ air ____ and _____ ingested food ____ it aids in producing sounds for ____ speech _____. Larynx: ( 4 points ) The larynx is an enlargement in the airway superior to the ______ trachea _____ and inferior to the ____ pharynx ____. It helps keep particles from entering the trachea and houses the vocal cords . The larynx is composed of a framework of _____ muscles ____ and _____ cartilages ____ bound by elastic tissue.
- Spring '17
- Gregory Katsaros