Describe how contraction of the diaphragm allows the lungs to fill and how oxygen from inhaled air enters the lungs.
To determine:
The contraction of diaphragm leads to inhalation.
Introduction:
There are two lungs in the chest cavity that are the primary organs of the respiratory system. There are other components of the respiratory system that transport air to the lungs. These components include trachea and pharynx. The trachea branches into small structures termed as bronchi.
Explanation of Solution
The process of breathing involves two processes, inhalation and exhalation. During exhalation, the carbon dioxide is moved out of the body via the nostrils. During inhalation, the oxygen is moved into the body via the nostrils. The processes of inhalation and exhalation are regulated by the movement of the diaphragm.
When the person inhales the air, the diaphragm contracts and pulls downwards. This leads to the rise and outward movement of the rib’s muscles. It increases the space in the thoracic cavity and decreases the pressure inside. So, when the air pressure in the alveoli decreases down to the atmospheric pressure, the air rushes inside the lungs and fills it.
During inhalation the diaphragm contracts. This leads to the increased space in the thoracic activity and the air rushes into the lungs.
Want to see more full solutions like this?
Chapter 20 Solutions
BELK SCIENCE F/LIFE-MASTRG. BIOL.AC+EBK
Additional Science Textbook Solutions
Genetics: From Genes to Genomes
Campbell Essential Biology (7th Edition)
HUMAN ANATOMY
Chemistry: A Molecular Approach (4th Edition)
Fundamentals Of Thermodynamics
- Which is the order of airflow during inhalation? a. nasal cavity, trachea, larynx, bronchi, bronchioles, alveoli b. nasal cavity, larynx, trachea, bronchi, bronchioles, alveoli c. nasal cavity, larynx, trachea, bronchioles, bronchi, alveoli d. nasal cavity, trachea, larynx, bronchi, bronchioles, alveoliarrow_forwardThe respiratory components of the medulla consist of which of the following? Dorsal respiratory group Apneustic center Ventral respiratory group Pneumotaxic center 1 only 2 only 1 and 3 only 2 and 4 onlyarrow_forwardWhat drives oxygen from the air spaces in alveoli, through tissue fluid, and across capillary epithelium? What drives carbon dioxide in the opposite direction?arrow_forward
- A contraction of the smooth muscle in the walls of the bronchi and bronchioles that tighten and squeeze the airway shut is known as a/an ______________arrow_forwardThe respiratory system_______. a. provides body tissues with oxygen b. provides body tissues with oxygen and carbon dioxide c. establishes how many breaths are taken per minute d. provides the body with carbon dioxidearrow_forwardDescribe the neural factors involved in increasing ventilation during exercise.arrow_forward
- Breathing _______. a. ventilates the lungs b. draws air into airways c. expels air from airways d. causes reversals in pressure gradients e. all of the abovearrow_forwardConsider the mechanics of breathing during quiet breathing. Name the TWO inspiratory muscles. State the changes in the intrapleural pressure (Pip) and the lungs’ volume during inhalation. How can air go into the lungs during inhalation?arrow_forward
- Anatomy & PhysiologyBiologyISBN:9781938168130Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark WomblePublisher:OpenStax CollegeHuman Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage LearningHuman Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage LearningCardiopulmonary Anatomy & PhysiologyBiologyISBN:9781337794909Author:Des Jardins, Terry.Publisher:Cengage Learning,