The talus can be subdivided into three parts; Head, Neck and Body.
The head forms a joint with the Navicular bone.
Neck is a roughened area in between body and head having small vascular channels.
Body has several visible joint surfaces. Its superior surface is semi-cylindrical with joint facets for two Malleoli and under surface of tibia. Malleoli are fork like structures that help keep ankle bone in place resulting in the stability of ankle joint
The ankle joint
Talus is one of the most important bones when it comes to ankle joints. Superiorly, laterally and medially this bone is attached to the distal end, lateral and medial malleolus of tibia respectively. Inferiorly, this bone is attached to Calcaneous bone and anteriorly Talus is attached to Navicular bone.
Talus bone, unlike any other bone, has no muscle attachments. Thus it is dependent on neighboring bones for maintaining its position and stability.
The blood supply of talus bone is not very efficient. Because of this fact broken talus bone takes longer to heal than any other bone. Thus a fracture of it bounds the person to walk with crutches for few weeks and afterwards walking with a cast or a boot.
Talus is apparently derived from fusion of three separate bone of Amphibians; Tibiale (articulating with tibia), Intermedium (between bases of tibia and fibula) and Centrale (in mid-part of tarsus). The talus joint in mammals is flexible than reptiles.