Skeleton Trivia
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100 free Skeleton trivia questions with answers — science & nature quiz, new questions added Oct 2026.
48 free skeleton trivia questions with answers. How many bones are you carrying around right now? Where is the smallest one, and which one is not attached to anything else? This skeleton trivia quiz starts inside the human body, with the skull, spine, ribs, hands and feet, and the surprisingly busy business of bone marrow and remodelling. Then it heads outdoors. You will meet Lucy and Sue, the most famous fossil skeletons on Earth, the bone chandelier of Sedlec, six million Parisians underground, the head-first Olympic sport called skeleton, and the skull-faced stars of Halloween: Skeletor, Jack Skellington and Disney's dancing skeletons of 1929. The questions run from easy ones a curious ten-year-old can answer to expert-level anatomy. Every answer has been checked against a primary source, mostly the relevant Wikipedia article, and the citation is attached to each question, so you can argue with us if you think we are wrong.
30 of 100 questions with answers and explanations. Play the quiz
Q 01How many bones does a typical adult human skeleton have?
206
206. That is only the textbook count: an extra rib or tiny extra bones along the skull's seams mean some adults have a few more.
Q 02What happens to most of the 'extra' bones a baby is born with as the child grows up?
Fuse together
Fuse together. A newborn has dozens more separate bones than an adult, and joining them takes years: the five vertebrae of the sacrum do not fuse into one bone until adulthood.
Q 03Which division of the skeleton holds the limbs and their girdles?
Appendicular skeleton
Appendicular skeleton. The name comes from the Latin for 'to hang upon': the arms and legs hang from the central column of skull, spine and ribs.
Q 04Rickets, which softens children's bones, usually comes from a lack of which vitamin?
Vitamin D
Vitamin D. The gut cannot absorb calcium without it, and because skin makes the vitamin in sunlight, children who get too little sun are among those most at risk.
Q 05Which bone is the largest and thickest in the human body?
Femur
Femur. The thigh bone makes up about a quarter of a person's height, so forensic scientists can estimate how tall someone stood from this single bone.
Q 06Which bone is the second largest in the human body?
Tibia
Tibia. The shinbone carries the body's weight between knee and ankle, while the slender fibula beside it bears almost none and serves mainly as an anchor for muscles.
Q 07The smallest and lightest bone in the human body is found where?
In the middle ear
In the middle ear. The stapes, shaped like a stirrup, is the last of three tiny bones that relay sound vibrations from the eardrum to the fluid of the inner ear.
Q 08Which horseshoe-shaped bone in the neck is the only one in the body not connected to any other bone?
Hyoid
Hyoid. It hangs from muscles and ligaments at the root of the tongue, giving the tongue and the swallowing muscles a movable anchor.
Q 09What is the everyday name for the skull's zygomatic bone?
Cheekbone
Cheekbone. Its name comes from the Greek for 'yoke', because it links the bones of the face to the side of the skull in an arch you can feel in front of each ear.
Q 10What are the 'soft spots' on a newborn's skull called?
Fontanelles
Fontanelles. They let the skull plates shift and overlap during birth, then give the fast-growing brain room to expand before they close over.
Q 11Which opening in the base of the skull does the spinal cord pass through?
Foramen magnum
Foramen magnum. In humans it sits well forward under the skull, balancing the head on an upright spine, so its position helps anthropologists tell whether a fossil species walked on two legs.
Q 12Which bone is the only movable one in the human skull, hinged just in front of each ear?
Mandible
Mandible. Its two joints glide as well as hinge, which is what lets the lower jaw grind food from side to side.
Q 13Which region of the spine, between the ribs and the hips, forms the lower back?
Lumbar
Lumbar. Vertebrae get bigger down the spine because each must carry more of the body's weight, so these five are the largest of all the movable ones.
Q 21A 'march fracture' is a stress fracture of which body part?
Foot
Foot. One of the long bones behind the toes cracks under repeated minor pounding, as happens to army recruits on long marches; joggers get it too.
Q 22What is the anatomical name for the heel bone, the largest bone in the foot?
Calcaneus
Calcaneus. The Achilles tendon, the thickest in the body, anchors to the back of it, so the calf muscles can lever the heel off the ground with every step.
Q 23The kneecap is the largest example of which type of bone, one that forms inside a tendon?
Sesamoid
Sesamoid. The word means 'like a sesame seed', a nod to how small most of them are; the kneecap lifts its tendon away from the joint, giving the thigh muscle extra leverage.
Q 14A giraffe's neck contains how many vertebrae, the same number as a human's?
Seven
Seven. Almost every mammal shares that count, sloths and manatees being the rare exceptions, so a giraffe gets its height by stretching each neck bone, not by adding more.
Q 15The topmost vertebra, on which the skull rests, is named after which figure from Greek mythology?
Atlas
Atlas. Just as the Titan held up the heavens, this ring-shaped vertebra holds up the head, cradling the base of the skull in two curved hollows.
Q 16Most ribs join which flat bone at the front of the chest?
Sternum
Sternum. It is the bone rescuers push on during CPR: hands stacked in the centre of the chest, pressing hard and fast to keep blood flowing.
Q 17The lowest two pairs of human ribs are known as what?
Floating
Floating. Fixed only to the spine, these short ribs reach only partway round the back, where they partly shield the tops of the kidneys.
Q 18The tailbone at the base of the spine takes its name from the Greek word for which bird?
Cuckoo
Seen from the side, the last few bones of the coccyx were thought to resemble a cuckoo's beak. It is made of three to five small vertebrae and is the remnant of a vestigial tail.
Q 19What are the eight small bones of the wrist called?
Carpals
Carpals. The boat-shaped scaphoid is the one most often broken, usually when someone throws out a hand to stop a fall.
Q 20Which digit of the hand has only two phalanx bones instead of three?
Thumb
Thumb. It makes up for the missing bone with a saddle-shaped joint at its base, which lets it swing across the palm to meet the other fingers.
Q 24Which bone is a baby most likely to break during a difficult birth?
Collarbone (clavicle)
Collarbone (clavicle). A newborn's break usually needs no treatment: it knits within weeks, and a small hard lump over the healing bone may be the only sign it ever happened.
Q 25Hitting your 'funny bone' actually means striking what?
A nerve
A nerve. The ulnar nerve runs just under the skin where it rounds the elbow end of the upper arm bone, so a knock there sends a sharp tingle down the forearm into the hand.
Q 26Which protein forms the fibrous framework of bone?
Collagen
Collagen. Its fibres give bone a slight spring, so the mineral crystals packed around them can make it hard without leaving it brittle.
Q 27Which cells break down old bone tissue, while osteoblasts build new bone?
Osteoclasts
Osteoclasts. They dissolve bone with acid and enzymes, which clears old tissue for rebuilding and also releases calcium into the blood when the body runs short.
Q 28Which condition, especially common in older women, thins the bones until a minor fall can break them?
Osteoporosis
Osteoporosis. Bone loss speeds up after the menopause as oestrogen falls, and doctors call the disease 'silent' because there are usually no symptoms until a bone breaks.
Q 29What is the main job of red bone marrow?
Making blood cells
Making blood cells. A newborn's bones hold nothing but this red marrow, but with age fatty yellow marrow replaces much of it, leaving the red kind mainly in the ribs, spine and hips.
Q 30What is the hardest substance in the human body, which is not actually bone?
Tooth enamel
Tooth enamel is almost pure mineral and is not living tissue, so unlike bone, which constantly rebuilds itself, enamel that wears away never grows back.