A&P of Respiratory System

The ______ are the sites in the lower part of the lungs where gases are exchanged between the respiratory and circulatory systems.

The respiratory system works interdependently with the _________ system.

The process of aerating the lungs is known as _________. The movement of air in and out of the lungs.

The upper respiratory tract includes the: (7)

The lower respiratory tract begins at the ______ and extends into the lungs via repeated branching of _______ into bronchioles and ending at the _________, where gas exchange occurs.

The lungs are divided into lobes: three lobes on the ______ and two lobes on the _____.

Each lobe of the lung is contained within a tough, protective double membrane called the _______, with ______ fluid in between.

The lungs are housed within the _______ cavity.

Air in the upper respiratory tract begins in the _____ and ______ and _______ where it is filtered, warmed and moistened.

Air flows from the nasal and oral cavities into the _________, a pathway beginning in the back of the throat and ending at the glottis.

The _________ is a shared passageway for both air and food.

The glottis is the passageway for air through the vocal chords and leads to the ________, commonly called the voice box.

Sound is produced in the _______ when air from the lungs is forced against the vocal chords.

Oxygen flow continues from the larynx into the ______.

The trachea splits into two main branches that enter the lungs as the right and left primary __________.

Primary bronchi branch repeatedly into smaller secondary and tertiary ________.

Tertiary bronchi again branch into microscopic tubes called __________.

Bronchioles divide further until they terminate in the air sacs of the lungs known as the ________.

The walls of the _____ are a single layer of epithelial tissue, which allows for the _______ diffusion of gases in and out.

The _________ and _______ in the brainstem monitor the levels of CO2 and pH in the blood.

increasing levels of _____ causes and increase in H+ ions, which makes the blood more acidic. This stimulates inhalation.

During ________, the muscular diaphragm contracts, increasing the volume of the thoracic cavity and in turn causes the lung volume to increase.

During inhalation, the alveolar pressure inside the lungs _________, causing air to flow into the lungs.

air flows into the lungs and down the pressure gradients from _______ (outside lungs) to ____(inside lungs).