What is axilla in anatomy?
Excerpt. The axilla is an anatomical region under the shoulder joint where the arm connects to the shoulder. It contains a variety of neurovascular structures, including the axillary artery, axillary vein, brachial plexus, and lymph nodes.
What is the left axilla?
The axilla (also, armpit, underarm or oxter) is the area on the human body directly under the joint where the arm connects to the shoulder. It also contains many sweat glands.
What is the axillary Inlet?
The apex is also referred to as the axillary inlet. The borders of the apex are made by the lateral surface of the first rib, the posterior surface of the clavicle, and the superior margin of the scapula. The axilla is filled with adipose (fat) and allows passage for: vessels, nerve plexus, lymphatics, and muscles.
What are the boundaries of axilla?
There are five anatomic borders of the axilla: the superior, anterior, posterior, lateral, and medial walls. The medial wall is the serratus anterior and the first four ribs. The humerus, the coracobrachialis, and the short head of the biceps form the lateral wall.
What is the Clavipectoral fascia?
The clavipectoral fascia encloses the subclavius muscle located below the clavicle and the pectoralis minor muscle (Fig. 2.10). The upper portion of the clavipectoral fascia, the costocoracoid membrane, is pierced by the cephalic vein, the lateral pectoral nerve, and branches of the thoracoacromial artery.
Is axillary anterior or posterior?
The axillary apex is the interval between the superior border of the scapula, the posterior border of the clavicle, and the external border of the first rib. The pectoralis major and the latissimus dorsi form the major anterior and posterior folds, respectively, of the axilla.
Why is the armpit important?
One of the warmest areas of the body, the armpit, or axilla, performs its most important function as home to more than 20 lymph nodes called the axillary lymph nodes . The axillary lymph nodes oversee the regulation and filtration of lymph through the upper limbs and back.
What are the triangles on anterior wall of axillary cavity?
It is a triangular space bounded medially by teres minor, laterally by long head of triceps brachii, and inferiorly by teres major. The scapular circumflex artery and scapular circumflex vein pass through this space.
Where is clavipectoral fascia located?
The clavipectoral fascia lies below the clavicular head of the pectoralis major. It fills in the space between the clavicle and the pectoralis minor. Between the 1st rib and the coracoid process of the scapula, the fascia is thickened to form the costocoracoid ligament.
Does medial pectoral nerve pierces the clavipectoral fascia?
Medially, it blends with the fascia covering the first two intercostal spaces, and is attached also to the first rib medial to the origin of the subclavius. The clavipectoral fascia is pierced by the cephalic vein, thoracoacromial artery and vein, lymphatics and lateral pectoral nerve.
Why does armpit hair exist?
It reduces friction Armpit hair prevents skin-to-skin contact when doing certain activities, such as running and walking. The same thing happens with pubic hair, as it reduces friction during sex and other activities.
Why would a man lose his underarm hair?
Testosterone promotes body hair growth in men. As a result, one common symptom of low testosterone is a loss of body hair. You may notice thinning of your armpit or pubic hair. Low testosterone also promotes fat storage, which typically accumulates on your belly.
What does the clavipectoral triangle contain?
The clavipectoral or deltopectoral triangle (lat. trigonum clavipectorale) is an anatomical triangle bordered by the following structures: clavicle. It contains the cephalic vein, thoracoacromial artery and pectoral nerves.
What artery passes through the clavipectoral triangle?
Clavipectoral triangle. The deltoid branch of the thoracoacromial artery also passes through this triangle, giving branches to both the deltoid and pectoralis major muscles. The subclavian vein and the subclavian artery may be accessed via this triangle, as they are deep to it.
What passes through the deltopectoral triangle?
It contains the cephalic vein, and deltopectoral fascia, which is a layer of deep fascia that invests the three structures that make up the border of the triangle. The deltoid branch of the thoracoacromial artery also passes through this triangle, giving branches to both the deltoid and pectoralis major muscles.
Where do the fascicles of the clavipectoral triangle emit their terminal branches?
The fascicles lying deep to the clavipectoral triangle emitted their terminal branches from the beginning of the upper margin of the axillary fossa. Medical browser? Full browser?