Question

The hardest part of the human body is

• A. Tooth enamel
• B. Femur
• C. Temporal bone
• D. Knee bone

Answer 1

The correct option is A

Tooth enamel

The correct option is A.

The explanation of the correct option:

1. Tooth enamel is the hardest tissue present in the human body. '
2. It is a thin outer covering of the tooth and covers the crown of the tooth. It protects the sensitive inner layer of the tooth known as the dentin.
3. The enamel is made up mainly of calcium and phosphorous that are bound together to form crystallites.

The explanation of the incorrect options:

Option B:

1. The femur is the longest, strongest bone in the human body. It is present in the thigh region.
2. It plays an important role as it holds the weight of the entire human body during movement.
3. It connects the muscles, tendons, and ligaments in the hips and knees to the rest of the body.

Option C:

1. The temporal bone is present at the lateral walls of the skull.
2. It consists of five parts. The squamous, tympanic, and petromastoid parts form the majority while the zygomatic and styloid processes project outwards.

Option D:

1. The knee bone is a hinge joint that is responsible for weight-bearing activities and movements.
2. It provides stability and functions as a shock absorber.

Final answer: The hardest part of the human body is tooth enamel.