AskDefine | Define tibia

Dictionary Definition

tibia n : the inner and thicker of the two bones of the human leg between the knee and ankle [syn: shinbone, shin] [also: tibiae (pl)]

User Contributed Dictionary




  1. In the context of "anatomy": The inner and usually the larger of the two bones of the leg or hind limb below the knee.
  2. In the context of "zoology": A segment of an insect's leg.


Derived terms


bone of the leg




  1. shin
  2. tibia

Derived terms




  1. Feminine of tibio.

Extensive Definition

The tibia, shinbone, or shankbone is the larger and stronger of the two bones in the leg below the knee in vertebrates and connects the knee with the ankle bones.

In humans

The tibia is found medial and anterior to the fibula. It is the second-longest bone in the human body, the largest being the femur. The tibia articulates with the femur and patella superiorly, the fibula laterally and with the talus inferiorly.

Gender differences

In the male, its direction is vertical, and parallel with the bone of the opposite side. In the female, it has a slightly oblique direction downward and lateralward, to compensate for the greater obliquity of the femur.


It is prismoid in form, expanded above, where it enters into the knee-joint, contracted in the lower third, and again enlarged but to a lesser extent below.
The superior tibiofibular articulation is an arthrodial joint between the lateral condyle of the tibia and the head of the fibula. The inferior tibiofibular articulation (tibiofibular syndesmosis) is formed by the rough, convex surface of the medial side of the lower end of the fibula, and a rough concave surface on the later side of the tibia. The tibia is connected to the fibula by an interosseous membrane, forming a type of joint called a syndesmoses.

Blood supply

The tibia derives its arterial blood supply from two sources:
  1. the nutrient artery (main source)
  2. periosteal vessels derived from the anterior tibial artery

Additional images

Image:Illu lower extremity.jpg|Lower extremity Image:Knee diagram.png|Knee diagram Posterior surface. Image:Gray440_color.png|Cross-section through middle of leg.

External links


tibia in Catalan: Tíbia
tibia in Czech: Holenní kost
tibia in German: Schienbein
tibia in Spanish: Tibia
tibia in Esperanto: Tibio
tibia in French: Tibia (os)
tibia in Croatian: Tibia
tibia in Italian: Osso tibiale
tibia in Hebrew: שוקה
tibia in Latin: Tibia (os)
tibia in Lithuanian: Blauzdikaulis
tibia in Dutch: Scheenbeen
tibia in Japanese: 脛骨
tibia in Norwegian: Tibia
tibia in Norwegian Nynorsk: Tibia
tibia in Polish: Kość piszczelowa
tibia in Portuguese: Tíbia
tibia in Simple English: Tibia
tibia in Slovenian: Golenica
tibia in Finnish: Sääriluu
tibia in Swedish: Skenben
tibia in Tagalog: Lulod
tibia in Telugu: అంతర్జంఘిక
tibia in Thai: กระดูกแข้ง
tibia in Ukrainian: Великогомілкова кістка
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