An animal with vertebrae made from either cartilage or bone is a vertebrate. Vertebrates can be mammals, fish, birds, reptiles or amphibians.Know More
Vertebrates all have a stiff vertebral column running down their bodies, and this column is made up of a series of discs and vertebrae to support the animal structurally and to lend it a certain amount of flexibility.
Scientists think that vertebrates first emerged during the Cambrian period, which was around 525 million years ago. The first known vertebrate is considered to be an animal known as Myllokunmingia, which had a skull and skeleton that was made up of cartilage.Learn more about Bones
Phalanges are the bones in most vertebrates' fingers and toes. There are three different types of phalanges, including distal, middle and proximal, for every digit except for the thumbs and big toes, which have two phalanges as opposed to the three phalanges that the other digits contain.Full Answer >
An example of a pivot joint in the human skeletal system is the rotation of the atlas around the axis. The uppermost cervical vertebra of the spine, the atlas sits on top of the axis and forms the joint that enables the various movements of the head, such as nodding and rotation. A pivot joint is one in which a bone, such as the atlas, fits into a ring formed by another.Full Answer >
In humans, seven pairs of ribs are directly connected to the sternum, commonly known as the breast bone. The ribs that are designated one to seven are attached to the breast bone by their costal cartilages. These ribs are also referred to as "true ribs."Full Answer >
Unearthed in mid-May 2014, the longest and largest bone ever found belongs to an as-yet unnamed species of titanosaur that was discovered in Patagonia. The bone, a femur, is well over 6 feet long.Full Answer >