Patella

Patella
Right knee
Details
Pronunciation/pəˈtɛlə/
OriginsPresent at the joint of femur and tibia fibula
Identifiers
Latinpatella
MeSHD010329
TA98A02.5.05.001
TA21390
FMA24485
Anatomical terms of bone
Posterior aspect of right human patella. (After Testut's Anatomy.)
X-ray of a normal adult right-sided patella by lateral projection

The patella (pl.: patellae or patellas), also known as the kneecap, is a flat, rounded triangular bone which articulates with the femur (thigh bone) and covers and protects the anterior articular surface of the knee joint. The patella is found in many tetrapods, such as mice, cats, birds, humans, and dogs, but not in whales, or most reptiles.

In humans, the patella is the largest sesamoid bone (i.e., embedded within a tendon or a muscle) in the body.