Thorax Flashcards
where is the thorax?
between the neck and abdomen
what is the chest?
superior part of the trunk, housing the pectoral girdle
what does the thoracic cavity hold? which systems does it include?
lungs and heart. respiratory and cardiovascular systems.
what is the thoracic cage?
rib cage
how is the thoracic cavity divided?
mediastinum (housing thoracic viscera), right and left pulmonary cavities which houses the lungs
what are the functions of the thoracic cage?
rigid but flexible, protect organs, resist internal pressure, attachment for and support upper limbs, anchoring origins of many muscles.
what does the thoracic skeleton consist of and what does it do?
12 pairs of ribs & cartilage, 12 thoracic vertebrae and IV discs, sternum, ribs, costal cartilage, thoracic vertebrae. It protects the thoracic viscera and abdominal organs
what are true ribs?
ribs 1-7 that directly attach to sternum through their own costal cartilages
what are false ribs?
ribs 8, 9 and usually 10. their cartilages connect to the cartilages of the ribs above them so they have an indirect connection to the sternum
what are floating ribs?
ribs 11, 12 and sometimes 10. they do not connect to sternum, instead they end in the posterior abdominal musculature.
what are typical ribs?
ribs 3-9. have head, neck, (connects head of rib with body at tubercle), tubercle, body/shaft
which are the atypical ribs?
1,2, 10-12
what is the intercostal space?
separate ribs and their costal cartilages from each other.
what do the thoracic vertebrae do?
gives bony protection to spinal cord, posture and support, attachment points for ligaments
what are the parts of the thoracic vertebrae?
body, transverse process, spinous process, lamina, pedicles, vertebra foramen, demi/costal facets where ribs attach.
where do spinal nerves pass?
from the spinal cord between the superior and inferior pedicles of vertebrae