Human bones, joints, skull anatomy, and skeletal structure.
Test your knowledge with these top questions!
Which bone protects the human brain?
The skull's cranium encloses and shields the brain, while its facial bones shape the face.
Which joint type lets the shoulder and hip move in many directions?
Ball-and-socket joints pair a rounded bone end with a cup-shaped socket, allowing wide motion.
How many bones does a typical human adult skeleton contain?
Babies are born with about 300 bones, and many of them fuse together by adulthood.
What bone forms the lower jaw and holds the teeth?
The mandible is the only skull bone that moves, hinging at the temporomandibular joint near the ears.