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Anatomy- Respiration

anatomy of respiration terms

TermDefinition
respiration exchange of gas between an organism and its environment
inspiration bringing oxygen to cells of the body by breathing in
expiration eliminate waste products by breathing out
alveoli minute air sacs located deep within the lungs; where gas exchange happens
air pressure force exerted on walls of a chamber by molecules of air
Boyle's law with a gas at a constant temperature (normally oxygen), as volume increased pressure decreased, and vice versa
the bony thorax contains... the pectoral girdle [scapula & clavicle], sternum, and pelvic girdle
muscle of respiration the diaphragm
C 3,4, and 5.... keep the diaphragm alive!
carina point of the first bifurcation in the bronchial tree
birfurcation splitting into two parts
airway patency airway is open
terminal bronchiole final tube in bronchial
surfactant substance which reduces surface tension to keep alveoli from collapsing during respiration (due to the negative pressure within the alveoli)
diaphragm contracts to enlarge the vertical dimension of the thoracic cavity
ribcage elevates to enlarge the transverse dimension of the thoracic cavity
pleural lining lining which completely covers the lungs and inner thoracic wall; privdes means of smooth contact for rough tissue; provides mechanism for translating force of thorax enlargement into inspiration
visceral pleural lining encases the lungs
parietal pleural lining thoracic linings identified by their locations -> mediastinal, pencardial, diaphragmatic, costal & apical
costal pleura covers inner surface of the rib cage
apical pleura covers the superior most region of the rib cage
pleural membranes composed of elastic fibrous tissue
pleurisy
central tendon intermediate region which is made up of large, leafy aponeurosis
aponeurosis sheet like tendon
abdominal aorta hiatus where the descending abdominal aorta passes through the diaphragm; adjacent to the vertebral column
esophageal hiatus where the esophagus passes through the diaphragm
foramen vena cava where the inferior vena cava passes through the diaphragm
external intercostal muscles provide ribs with both unity and mobility; elevate rib cage
clavicular breathing a form of respiration in which a major source of thorax expansion arises from elevation of rib cage via contraction of neck accessory muscles of inspiration, most notably sternocleidomastoid
passive expiration diaphragm returns to its resting position with no use of accessory muscles
thoracic fixation closing off the vocal folds in order to increase the pressure in the abdomen and thoracic cavity i.e. childbirth
positive pressure air molecules are compressed, container is smaller
negative pressure a lot of space between air molecules, container is large
esophagus collapsed tube (unless a bolus is going down) posterior to trachea pushes food down through gravity and peristaltic muscle contractions
hyperventilation occurs when the rate and quantity of alveolar ventilation of carbon dioxide exceeds body's production of carbon dioxide
hypoxia a condition in which the body or a region of the body is deprived of adequate oxygen supply
recoil forces the greater you distend or distort material, the greater is force required to hold it in that position and greater is force with which it returns to rest; referring to the thoracic cavity
Created by: terriers16
 

 



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