The total number of bones in an adult human are:

The correct answer is 206.

Explanation:

The body's internal structure is the Human skeleton.

• This is made up of 300 bones at birth-this number falls by adulthood to 206 bones as certain bones have fused. In the skeleton, the bone mass reaches maximum density around age 30.
• Bones are connected to other bones by long fibrous straps called ligaments.
• Tendons connect muscle to bone.
• Ligaments and Tendons both are made of collagen.
• Many factors work together to ensure the strength and health of bones. Bone density relies on:
  • A steady supply of dietary calcium
  • Adequate vitamin D from sunshine and food
  • A healthy diet with plenty of vitamins and minerals
  • Various hormones including parathyroid hormone, growth hormone, calcitonin, oestrogen, and testosterone
  • Regular weight-bearing exercise.

Additional Information

The human skeleton is made up of 206 bones, including bones of the:

• The femur (the thigh bone) is the largest bone in the human body whereas the stapes (bone of ear) is the smallest bone of the body. 
• Skull: including the jaw bone
• Spine: cervical, thoracic and lumbar vertebrae, sacrum, and tailbone (coccyx)
• Chest: ribs and breastbone (sternum)
• Arms: the shoulder blade (scapula), collar bone (clavicle), humerus, radius, and ulna
• Hands: wrist bones (carpals), metacarpals, and phalanges
• Pelvis: hip bones
• Legs: the thigh bone (femur), the kneecap (patella), shin bone (tibia) and fibula
• Feet: tarsals, metatarsals, and phalanges.