Armpits
Armpits (/'ɑːmpɪts/)
The armpit or axilla (/'æksɪlə/) is the area on the human body directly under the joint where the arm connects to the shoulder. It also provides the under-arm sweat glands.
Etymology
The term "armpit" comes from Old English earm "arm" and pytt "hole," reflecting the concave shape of the body part. The medical term "axilla" is derived from Latin and means "wing," referring to the shape and location of the armpit as if it were a bird's wing.
Anatomy
The armpit is the hollow area that houses a dense cluster of lymph nodes, which filter substances out of the lymph fluid. It is also home to a large concentration of apocrine sweat glands, which are responsible for the strong odor associated with armpit sweat.
Related Terms
- Lymph nodes: Small, bean-shaped structures that produce and store cells that fight infection and disease.
- Apocrine sweat glands: These glands are found in the armpits and groin. They produce a thick, oily sweat that, when broken down by bacteria, can produce a strong odor.
- Axillary nerve: A nerve that passes through the armpit, providing sensation to the skin and motor function to the deltoid and teres minor muscles.
- Axillary artery: The artery that carries oxygenated blood to the various parts of the upper body, including the armpit.
- Axillary vein: The vein that carries deoxygenated blood away from the upper body, including the armpit.
External links
- Medical encyclopedia article on Armpits
- Wikipedia's article - Armpits
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