Chapter 5 - Respiratory system
Terms in this set (26)
The respiratory system contains 6 parts divide into the lower and upper tracts true/false
The upper respiratory tract includes
The lower respiratory tract includes
nose (Entry to the respiratory system is through the nose)
lined with mucous membrane and fine hairs, it acts as a filter to moisten, warming and humidifying the entering air and removing foreign particles. The cilia in the nose trap and move foreign particles toward the outside, away from the lungs. Sneezes are produced by large particles being trapped in the nose.
air cavities within the cranial bones that open into nasal cavities
Air then travels through the pharynx, which is also called the throat
It is about 5 inches long and is divided into the nasopharynx, oropharynx and laryngopharynx
serves as a food and air passageway. Air enters from the nasal cavities and passes through the pharynx to the larynx. Food enters pharynx from the mouth and passes into the esophagus (also called the throat)
the nasopharynx is located behind the nose and contains the adenoids
lymphoid tissue located behind the nasal cavity
the oropharynx is located behind mouth and contains the tonsils
lymphoid tissue located behind the mouth
the laryngopharynx is located behind larynx or the voice box.
location of the vocal cords. Air enters from the pharynx (also called the voice box)
Then the air goes through the trachea, or windpipe
It is 1 inch wide and about 4 inches long. It is made of smooth muscle, reinforced with C-shaped cartilage and contains cilia
passageway for air to the bronchi (also called the windpipe)
The trachea branches into two tubes, called bronchi (singular is bronchus), one to each lung
the right bronchus is larger than left. Oftentimes foreign bodies inhaled or aspirated get lodge in the right bronchus.
bronchus (pl bronchi)
one of the two branches from the trachea that conducts air into the lungs, where it divides and subdivides. The branching resemble a tree; therefore, they are referred to as a bronchial tree
The bronchi subdivide into smaller bronchi, called
bronchioles and terminate as alveoli
smallest subdivision of the bronchial tree
alveolus (pl alveoli)
air sacs as the end of the bronchioles. Oxygen and carbon dioxide are exchanged through the alveolar walls and the calipparies
The lungs are cone-shaped, spongy organs within the pleural cavity of the chest. The lungs are elastic tissues filled with tubes and sacs that carry air and blood vessels that carry blood
the right lung is larger than the left. The right lung has three lobes, left has two lobes. The lungs contain about 300 million alveoli where exchange of oxygen and carbon dioxide takes place.
Lungs main function
is to bring air into intimate contact with blood so that the oxygen and carbon dioxide can be exchanged.
double-folded serous membrane covering each lung and lining the thoracic cavity with a small space between, called the plural cavity, which contains serous fluid
space between the lungs. It contains the hear, esophagaes, trachea, great blood vessels, and other structures
The diaphragm separates chest and abdomen and its contraction causes respiration
this contraction produces a vacuum within the thoracic cavity to draw in air (inhalation). When the diaphragm relaxes, air is pushed out of lungs (exhalation).
muscular partition that separates the thoracic cavity from the abdominal cavity. It aids in the breathing process by contracting and pulling air in, then relaxing and pushing iar out