General Anatomy- Thoracic Anatomy Flashcards
What are the true, false and floating ribs
Ribs 1-7 (true)- actually articulate w sternum
Ribs 8-9, 10 (false)- articulate with cartilage of rib above
Ribs 11-12- Floating
What are the typical ribs (+ what are the common features they have)
3-9
-Head w 2 articular demifacets
-neck between head and tubercle
what does the two areas of the rib tubercle articulate with
- smooth oval facet- articulation w transverse process of corresponding vert
- Rough- attach to lat costotransverse lig
All the costosternal joints are considered what type of joint
all of the costosternal joints are synovial jts excepts the 1st which is a primary cartilaginous
What are the atypical ribs
1,2,10-12
why is the 1st rib atypical
-shortest
-head has only one articular facet
-Rib has additional tunercle (for scalenus ant)
- no costal groove but groove for subclavian artery
Why is the 2nd rib atypical
-large rough tuberosity need its middle for the attachment of sertatus ant
why are ribs 10-12 atypical
only possess one facet on the head
mm of the intercostal space
external- fibres running downwards and medially
Internal- fibres running upwards and medially
innermost- fibres running upwards and medially
Neuromuscular bundle contents from top to bottom
Intercostal vein
intercostal aa
intercostal nerve
What is the breast and where is it located anatomically
Modified apocrine sweat gland located in the superficial fascia except for its tail which is located under the deep fascia in the axilla
what supports breast
Glandular tissue is attached to the skin above and the pectoral fascia below by the suspensory ligs of cooper
What is the blood supply of the breast
Lateral thoracic aa
Internal thoracic aa
2-4 ant intercostal arteries
75% of lymph drainage of breast goes where, + where does the rest go
75% drains to the ant pectoral group of axillary nodes then to central group and apical group of axillary nodes
Rest- Interna thoracic aa
what lvl separated the sup and inf mediastinum
Manubriosternal joint and IVD of T4-5
superior div of the mediastinum contains what (8)
TV PASTER
Trachea
Vagus
Phrenic
Arch of aorta
SVC
Thoracic duct
Esophagus
Remnant of thymus
What is the inf mediastinum broken up into
ant (bw sternum and heart)
Middle
post (bw heart and thoracic vert)
What is in the anterior compartment (3)
connective tissues
lymph nodes
remnants of thymus
What is in the middle mediastinum
heart
pericardium
roots of great vessels
phrenic neerves
What is located in the post compartment of mediastinum (7)
VS DATES
Vagus
splanchnic nerves
defending thoracic aorta and branches
Azygos venous system
thoracic duct
esophagus
sympathetic trunks
where does esophagus start and end and at what lvl does it pass thru diaphragm
starts- inf border of cricoid cartilage C6
diaphragm pass thru at T10
Ends- T11
What are the 3 layers of esophagus from in to out
Inner- stratifies non keratinized squamous epithelium
middle- submucosa
outer- 2 layers of mm (out longitudinal and inner circular)
What type of mm is upper 1/3, middle 1/3 and lower 1/3
upper- skeletal
middle- combo
lower- smooth
What is the upper middle lower esophagus supplied by and lymph drained by
upper- inf thyroid aa, lower deep cervical lymph nodes
middle thoracic aa, mediastinal lymph nodes
lower- left gastric aa, left gastric lymph nodes
