Skip Navigation
Stage 1 / 1 day Stage 2 / 2-3 days Stage 3-1 / 4 days Stage 3-2 / 4-5 days Stage 4 / 6 days Stage 5a-1 / 7 days Stage 5a-2 / 8 days Stage 5b / 9 days Stage 5c / 12 days Stage 6 / 13-17 days Stage 7 / 16-19 days Stage 8 / 23 days Stage 9 / 25 days Stage 10 / 28 days Stage 11 / 29 days Stage 12 / 30 days Stage 13 / 32 days Stage 14 / 33 days Stage 15 / 36 days Stage 16 / 39 days Stage 17 / 41 days Stage 18 / 44 days Stage 19 / 45-47 days Stage 20 / 49 days Stage 21 / 49-52 days Stage 22 / 52-55 days Stage 23 / 56 days
Atlas of Human Embryos Chapter   Figure
 <   >  search results: axillary lymph sac Search   Fig. 7-18-26 Fig. 7-19-27

T-1 spinal ganglion, aorta, ascending aorta, axillary artery, axillary lymph sac, axillary vein, brachial plexus, digit 3, erector spinae muscle group, humerus, infundibulum of right ventricle, left atrium, left pulmonary artery, mesocardium (cranial part), origin of left recurrent laryngeal nerve from the left vagus nerve, palm of hand, phrenic nerve, pulmonary semilunar valve, pulmonary trunk, rib 1, right atrium, right pulmonary artery, superior vena cava, transversospinal muscle group, truncus septum, vagus nerve (CN X)

A section through the pulmonary semilunar valve.

Observe:
1. The infundibulum of the right ventricle below the pulmonary semilunar valve and the right and left pulmonary arteries arising from the pulmonary trunk above the valve.
2. The pulmonary arteries passing through the cranial part of the mesocardium.
3. The origin of the left recurrent laryngeal nerve from the left vagus nerve between the aorta and left pulmonary artery.
4. The brachial plexus and axillary artery, vein and lymph sac lateral to the first rib.
5. The primordium of the third digit of the hand.


Keywords: T-1 spinal ganglion, aorta, ascending aorta, axillary artery, axillary lymph sac, axillary vein, brachial plexus, digit 3, erector spinae muscle group, humerus, infundibulum of right ventricle, left atrium, left pulmonary artery, mesocardium (cranial part), origin of left recurrent laryngeal nerve from the left vagus nerve, palm of hand, phrenic nerve, pulmonary semilunar valve, pulmonary trunk, rib 1, right atrium, right pulmonary artery, superior vena cava, transversospinal muscle group, truncus septum, vagus nerve (CN X)

Source: Atlas of Human Embryos.