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
According to the University of Leeds Histology Guide, the connective tissue known as cartilage is made up of 75 percent water, as compared to 25 percent for bone. Cartilage is more flexible than bone and is avascular, whereas bone has a very good blood supply.Full Answer >
The principal function of the humerus is as a muscular insertion and origination point for a number of muscles, including the deltoid and pectoralis major. Since it is connected to the shoulder via a rotational joint, the humerus also supports the arm's various physical functions, such as lifting.Full Answer >
Some examples of a gliding joint are the joints located in the wrists, ankles and spine. Gliding joints, also called plane joints, connect two bone plates that glide past or against each other to facilitate movement. A hand waving from side-to-side is one example of the use of gliding joints.Full Answer >
Each wrist has eight carpal bones arranged in two rows. This group of bones joins the long bones in the forearm, which are called the radius and ulna.Full Answer >