Flashcards in (second midterm) Lecture 8 (5/2/16) PT. 1 Deck (24):
The diaphragm is derived from....
hypaxial musculature of cervical segments
What innervates diaphragm?
right and left phrenic nerves
C3, 4, 5
How many arcuate ligaments are there? What do they do?
lateral (2), medial (2), median
they attach the diaphragm to ribs & sternum
How does the aorta get through the diaphragm?
via the aortic opening
How does the inferior vena cava get through the diaphragm from below?
via the canal opening
How does the esophagus get through the diaphragm?
via the esophageal opening
What are crura?
two muscular columns (right and left) that help attach diaphragm
The center of the diaphragm become less meaty and more connective tissue-like; that area is called:
the central tendon
Respiratory tree consists of...
Trachea > primary bronchi > secondary bronchi > tertiary bronchi > bronchioles > alveoli
Lung does NOT expand into ______.
What is "pleurisy"?
painful chaffing between visceral and parietal pleura
What is the partition between the right and left pleura and the enclosed lung?
Parasympathetic nervous control of lungs is innervated by..
Opening of the respiratory tree is innervated by...
Sympathetic fibers that innervate respiratory tree go up into the neck and then come back down. Why?
because they started in the neck and they moved down
What pulls up on 1st and 2nd ribs?
Each successive rib pulls on the next rib via what muscles?
When the ribs move up and out, what happens to volume of thoracic cavity?
volume of thoracic cavity increases
Innervation of scalenes:
What happens when the thoracic cavity volume increases?
What happens when pressure decreases?
air gets sucked in
When the diaphragm contracts, this does what to the thoracic volume?
facilitated by all the muscles of the ribcage, pressurizing coelom, and contracting limb muscles around the axial body wall