Armhulen

Armhulen, also known as the armpit or axilla, is the anatomical region located beneath the junction of the arm and the torso. It serves as a passageway for numerous vital structures, including blood vessels, nerves, and lymphatic vessels, facilitating communication between the upper limb and the thorax.

The boundaries of the armhulen are defined by several anatomical landmarks. Anteriorly, it is bordered by the pectoralis major and minor muscles; posteriorly by the latissimus dorsi and teres major muscles; medially by the serratus anterior; and laterally by the intertubercular sulcus of the humerus. The apex of the armpit is near the clavicle, while the base is formed by the skin and fascia of the armpit region.

The contents of the armhulen include important neurovascular structures such as the axillary artery and vein, the brachial plexus, and the lymph nodes associated with the axillary lymphatic system. These structures are vital for the circulation, innervation of the upper limb, and immune response.

The lymphatic system within the armpit plays a significant role in filtering lymph fluid and fighting infections. The axillary lymph nodes are often examined in medical practice to assess the spread of infections or cancers, particularly breast cancer.

Due to its complex anatomy and proximity to critical structures, the armhulen is a significant focus in surgeries, diagnostics, and treatments related to the upper limb, breast, and thoracic regions. Proper understanding of this region is essential for healthcare professionals involved in clinical diagnosis and surgical procedures.