Thorax Flashcards
Anterior boundary of thorax
Sternum, ribs, inercostal and chest wall muscles, skin
Posterior boundaru of thorax
Spine, scapula, ribs, intercostal and back muscles, skin
Superior boundary of thorax
Thoracic inlet
Inferior boundary of thorax
Diaphragm, thoracic outlet
Eah thoracic vertebrae has a ___ attached to it
Rib
True ribs are
Attach directly to the sternum
False ribs
The first three attach to the cartilageof the rib above it
Floating ribs
Cartilage ends in the abdominal wall muscle
3 parts of sternum
Manubrium
Body
Xiphoid process
Function of the thorax
To protect the organs a nd support the head and neck
Thoracic vertebrae have _______ which are the divets the ribs attach
Demifacet
What is the thoracic inlet
Aperture ring of bone, most superior
6 structures that pass through the thoracic inlet
Trachea Esophagus Carotid arteries Jungular veins Nerves Lymphatics
The diaphragm seperates
The thoracic and abdominal cavity
The muscle fibers of diaphragm converge into
A central tendon
3 hiatus’ of the diaphgram
IVC, aorta and esophagus
The inferior border of the diaphragm lines the
Thoracic outlet
Anterior chest wall muscles from superior to deep
Pectoralis major
Pectoralis minor
Serratus
Intercostal muscles
3 intercostal layer
External intercostal
Internal
Innermost
Posterior chest wall muscles
Rhomboid
Latissmus dorsi
Trapezius
Shoulder girdle muscles
Rhomboid major is ___________ to rhomboid minor
Inferior
Pericardial cavity is within
Mediastinal cavity
Mediastinum found in middle of
Thorax between the two pleural cavities
Mediastinum divided into what two cavities
Superior and inferior
Inferior mediastinum divided into what 3 sections
Anterior
Middle
Posterior
Superior mediastinum contains what 11 things
Trachea Esophagus Thymus Nerve and nervous plexuses Superior vena cava Brachiocephalic veins Aortic arch Common carotid artery Lt subclavian Brachiocephalic arteries
Middle mediastinum contains
Heart Pericardium Ascending aorta Pulmonary trunk Superior vena cava
Anterior mediastinum (2) contents
Thymus remnants
Lymph nodes
Posterior mediastinum contents (3)
Esophagus
Thoracic aorta + branches
Nerve plexus from SNS
Parietal pleura
A serous membrane lining the chest cavity
Visceral pleura
A serous membrane covering the lung surface
Bifurcation of the trachea is at what level and is called what
T5
carina `
Sternal angle is
Between manibrium and body of sternum
