10 most difficult bones riddles

Synapsids were the largest terrestrial vertebrates in the Permian period, 299 to 251 million years ago, although some of the larger pareiasaurs at the end of Permian could match them in size.

Almost all mammals have seven neck bones, including giraffes with long necks and whales with short necks. The few exceptions include manatees and two-toed sloths, which each have only six cervical vertebrae, and three-toed sloths with nine cervical vertebrae

The human foot consists of 26 bones and 33 joints.

The slender snipe eel (Nemichthys scolopaceus) is a fish that can weigh only a few ounces, yet reach 5 feet or 1.5 m in length. Features include a bird-like beak with curving tips, covered with tiny hooked teeth, which they use to sweep through the water to catch shrimp and other crustaceans. It has more vertebrae in its backbone than any other animal, around 750.

Pneumatic bones are very light, as they contain hollow cells filled with mucous membrane and air.Found in close proximity to nasal cavity. In the human body, pneumatic bones are found only in the skull (the frontal bone, maxilla, sphenoid, ethmoid bone, temporal bone)

The cervical spine is made up of 7 vertebrae. The first 2, C1 and C2, are highly specialized and are given unique names: atlas and axis, respectively. By the atlanto-axial joint, it forms the pivot upon which the first cervical vertebra (the atlas), which carries the head, rotates.

The sphenoid bone is an unpaired bone of the neurocranium. It is situated in the middle of the skull towards the front, in front of the temporal bone and the basilar part of the occipital bone. Its shape somewhat resembles that of a butterfly or bat with its wings extended.

Sharks are a group of fish characterized by a cartilaginous skeleton. Large sharks can easily be crushed under their own weight on land, because sharks do not have rib cages.

Unlike human arms, cat forelimbs are attached to the shoulder by free-floating clavicle bones, which allows them to pass their body through any space into which they can fit their heads.

Humans have 7 cervical, 12 thoracic, 5 lumbar, 5 fused sacral, and 3 to 5 fused caudal vertebrae (together called the coccyx). The vertebral column is characterized by a variable number of curves.