Axilla

• axilla shealth 
• brachial plexus
• axillary vessels 
• lymph nodes
• lymphatic vessle
• portions of 3 muscles
• (6 ish)

• a network of nerves innervating the upper limb
• The beging above the clavical and terminates inferolateraly to the
• C5-T1

skin and fascia of the armpit

• defined by the anterior axillary fold
•  pec. min. and pec. major and the clavipectoral fascia

• defined by the posterior axillary fold
• teres major, latissium dorsi ,subscapularis muscles

The lateral thoracic wall, the serratus anterior muscle

the intetubercular sulcus of the humerus

• a thin layer of connective tissue arounding the axillary vessels and component of the brachail plexus
• The sheath extends from the first rib to the teres major

• formed from the joining of the brachial and basilic vein
• formed near the lateral border of the teres major
• ends near the lateral border of the first rib at which point the cepahalis vein drains into it
• medial to the cephalic vein drainage the axillary artery changes into the Subclavian vein.

• begins at the lateral border of the 1st rib
• they run together with the axillary vein
• and it is a continuation of the subclavian artery . 
• it ends at the inferior border of the teres muscles where it turns into the brachial artery

• there are 3 parts
• the 1st, 2nd, and 3rd!
• 1st- later to the first rib and medial to the pectoralist minor 
• 2nd: posterior to the pectoralis minor
• 3rd: laterl to the pectoral minor and inferior to the teres major

superior thoracic artery

• thoracoacromial artery 
• lateral thoracic artery

it is often called the lateral mamillary artery because in females it supplies the lateral portion of the breast

clavicle scapula and first rib medially

• subscapular artery
• posterior circumflex humeral artery
• anterior circumflexhumeral artery
• it has just as many branches as it part name

• three muscles attach
• pectorlais minot
• coracobrachialis
• short head od the biceps brachii

• pierxces the coracobrachialis muscle .
• It is the most lateral terminal branch of the brachial plexus

• The upper and lower subclavian nerve
• thoracodoral nerve
• then terminates as the axillary and radial nerves

only sensory and motor nerve to the posterior compartment of the upper limb