Enthesis (plural: entheses) is the point at which a tendon or ligament or muscle inserts into bone, where the collagen fibers are mineralized and integrated into bone tissue. The collagen to bone interface is via Sharpey's fibers.

There are two types:

In a fibrous enthesis, the collagenous tendon or ligament directly attaches to the bone, whilst the fibrocartilaginous enthesis displays 4 zones during the transition from tendon/ligament to bone:

A disease of the entheses is known as an "enthesopathy" or "enthesitis" and is characteristic of spondyloarthropathy but is present in other pathologies as well.

The enthesis is the primary site of ankylosing spondylitis.

David Sherry (born 1974) is an artist.

Sherry was born in Northern Ireland before studying at the Glasgow School of Art. He is best known for his performance art. Stitching is a video of him stitching pieces of wood to his feet while he offers verbal instructions on how to do this. Other works include Carrying a bucket of water about for a week and Avoiding eye contact for one seven day period, both of which consist of the activities in their titles. Sherry has said he is trying to "expose the systematic processes of day to day life".

In 2003, Sherry was shortlisted for the Beck's Futures prize.

In 2006 Sherry exhibited at WestGermany Gallery, Berlin with artist Daryl Waller. The exhibition was entitled 'Solid'.

He lives and works in Glasgow.