Joint

A joint is the place where two or more bones make contact.^[1] They allow movement (except for skull bones) and give mechanical support.^[2]

Joints have cartilage in between them, which help to make the movement flexible. Joints are described structurally and functionally. Structural classification is how the bones connect to each other; function is the degree of movement between the articulating bones.

Synovial bursa

A synovial bursa is a small fluid-filled sac lined by a synovial membrane. It has an inner capillary layer of viscous synovial fluid (bit like raw egg white). The bursa is a cushion between bones and tendons and/or muscles around a joint. This helps to reduce friction between the bones and allows free movement.

References

[1]
"Joint definition". eMedicine Dictionary. 27 April 2011. Archived from the original on 22 January 2012. Retrieved 27 January 2012.
[2]
Ellis, Harold; Susan Standring; Gray, Henry David (2005). Gray's anatomy: the anatomical basis of clinical practice. St. Louis, Mo: Elsevier Churchill Livingstone. p. 38. ISBN 0-443-07168-3.{{cite book}}: CS1 maint: multiple names: authors list (link)

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[1] [1]
"Joint definition". eMedicine Dictionary. 27 April 2011. Archived from the original on 22 January 2012. Retrieved 27 January 2012.

[isbn0-443-07168-3-2] [2]
Ellis, Harold; Susan Standring; Gray, Henry David (2005). Gray's anatomy: the anatomical basis of clinical practice. St. Louis, Mo: Elsevier Churchill Livingstone. p. 38. ISBN 0-443-07168-3.{{cite book}}: CS1 maint: multiple names: authors list (link)

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