venous drainage of the trunk Flashcards
Arteries have ______, while veins have _______.
branches
tributaries
Arteries always lead _____ from the heart and veins ______ the heart, irrespective of the oxygen content of the blood carried.
away
towards
what are the great arteries leaving the heart
aorta and pulmonary trunk.
what are the great veins entering the heart
superior vena cava and inferior vena cava
what are the main veins draining blood from the body
superior vena cava (SVC), which drains blood from the head, neck and upper limbs, and the inferior vena cava (IVC), which drains blood from abdominal and pelvic cavities and lower limbs.
SVC
drains blood from the head, neck and upper limbs
inferior vena cava (IVC),
drains blood from abdominal and pelvic cavities and lower limbs.
SVC description
short diameter vein located in anterior right superior mediasteinum
embryologically how is the SVC formed
by left and right brachiocephalic veins (innominate veins) which also received blood from upper limbs, eyes and neck
is there a valve that separates right atrium from SVC
no
right atrium function
conducts blood from right material and right ventricular contraction upwards into the IJV - jugular venous pressure and into sternocleidomastoid muscle
where does SVC begin
behind lower border of the first right costal cartilage and descends vertically behind 2nd and 3rd intercostal spaces
where does SVC drain into
atrium at the level of third costal cartilage
what is the lower half of SVC covered by
fibrous pericardium which is peirced by SVC at level of 2nd costal cartilage
after circulating systematically in the body where does deoxygenated blood go
returns to right atrium through SVC - upper body or Vena cava - everything below diaphragm
the azygos venous system (azygos = unpaired), drains blood from
the posterior intercostal veins to the SVC.
These veins are found lying immediately adjacent to the thoracic aorta
the azygos venous system (azygos = unpaired), drains blood from
the posterior intercostal veins to the SVC.
These veins are found lying immediately adjacent to the thoracic aorta
what is the main vein of venous drainage system
azygos vein lying immediately to the right of the descending thoracic aorta.
what is the main vein of venous drainage system
azygos vein lying immediately to the right of the descending thoracic aorta.
azygous venous system
It consists of the azygos vein on the right side of the posterior mediastinum, and the hemiazygos venous system (hemi = “half”: it is not as well-developed as the azygos system) on the left side.
The hemiazygos veins themselves drain into
the azygos vein by crossing from left to right at levels T8/T9.
Into which main vein does the azygos vein drain?
superior vena cava
Into which main vein does the azygos vein drain?
superior vena cava
Which chest wall veins are drained by the azygos and hemiazygos venous systems – anterior or posterior intercostal veins?
The posterior intercostal veins drain into the azygos (right side) and hemiazygos and accessory hemiazygos vein (left side)
