OsteoporosisBrittle bone disease, Thin bonesOsteoporosis is loss of bone density that leaves bones fragile enough to break from a minor fall or even a cough. It causes no symptoms until a fracture happens, which is what makes it dangerous.
The skeleton: bones you should know
The adult skeleton has 206 bones, and a couple of dozen names cover most of what a doctor will mention to you. This quiz covers the main bones, what they protect, and the ones that break most often.
8 questionsabout 4 minbeginnerFree · no sign-up
Question 1/8
1. How many bones are there in the adult human skeleton?
Every question, with the answer explained
The full set, for revision or for reading straight through. The correct answer is marked, and the explanation says why.
1. How many bones are there in the adult human skeleton?
- 106
- 206
- 306
- 406
206. 206 in the adult. Babies are born with around 270; many fuse during growth, which is why the adult count is lower.
2. What is the longest bone in the body?
- The tibia
- The humerus
- The femur
- The fibula
The femur. The femur, the thigh bone. It is also the strongest, which is why a femoral fracture usually means major force — or badly weakened bone.
3. Which bone is commonly called the collarbone?
- The scapula
- The clavicle
- The sternum
- The rib
The clavicle. The clavicle. It is one of the most frequently broken bones, typically from a fall onto an outstretched hand or the shoulder.
4. How many vertebrae are in the cervical spine?
- Five
- Seven
- Twelve
- Thirty-three
Seven. Seven cervical vertebrae in the neck, then twelve thoracic, five lumbar, the fused sacrum and the coccyx.
5. Which bone protects the brain?
- The mandible
- The cranium
- The sternum
- The pelvis
The cranium. The cranium — the domed part of the skull, formed from several fused bones. The mandible is the lower jaw, the only freely moving bone of the skull.
6. What is the patella?
- The kneecap
- The ankle bone
- The wrist bone
- A rib
The kneecap. The kneecap, a sesamoid bone sitting within the quadriceps tendon. It improves the leverage of the muscle that straightens the knee.
7. Which bone in the forearm is on the thumb side?
- The ulna
- The radius
- The humerus
- The carpal
The radius. The radius sits on the thumb side. A distal radius fracture — Colles' fracture — is the classic broken wrist from a fall onto an outstretched hand.
8. Which condition thins bone and makes fractures likely after minor falls?
- Osteoarthritis
- Osteoporosis
- Rheumatoid arthritis
- Gout
Osteoporosis. Osteoporosis reduces bone density silently until something breaks. It is common after menopause and with vitamin D deficiency, both widespread in Pakistan.
Words used in this quiz
- ArthritisJoint inflammation, Joron ka dardArthritis means pain, swelling and stiffness in a joint. It is an umbrella word covering more than a hundred conditions, of which wear-related osteoarthritis and immune-driven rheumatoid arthritis are the two commonest.
- X-rayRadiograph, Plain filmAn X-ray uses a small dose of radiation to produce an image, and it is best at showing bone and the chest. It is quick, widely available and usually the first imaging test requested.
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