Q:

What is the average human head circumference?

A:

Quick Answer

The average head circumference of an adult male and female is 22.44 and 20.87 inches, respectively. However, averages vary widely depending on the age and ethnicity of the individual.

Know More
What is the average human head circumference?
Credit: Mieke Dalle Photographer's Choice Getty Images

Full Answer

Forensic anthropologists at the University of Tennessee, Knoxville have recently determined that American head size is on the rise. By studying skulls from the mid-1800s through the mid-1980s, researchers discovered that the average skull "has grown by 200 cubic centimeters, a space equivalent to a tennis ball." Shape and length have also morphed over the last century, and in a disproportionate manner. For example, skull height has grown by nearly 7 percent, yet femur length has only increased 2 percent.

Sources:

  1. tntoday.utk.edu

Is this answer helpful?

Similar Questions

  • Q:

    What is the function of the odontoid process?

    A:

    According to About.com, the odontoid process serves as a pivot point for the skull and first cervical vertebrae, which allows the head and neck to rotate. The odontoid process is a projection that grows off the front portion of the second cervical vertebrae, which is also called the axis.

    Full Answer >
    Filed Under:
  • Q:

    How thick is the human skull?

    A:

    The thickness of the average human skull depends on a number of factors, including gender. The average skull thickness for men is .25 inches, and the average for women is .28 inches.

    Full Answer >
    Filed Under:
  • Q:

    What are human bones made of?

    A:

    The main component of bone is bone matrix, which is a mixture of a fibrous protein called collagen and carbonated hydroxyapatite, an inorganic compound mostly made of calcium and phosphate. The combination of fibrous collagen and crystallized calcium makes bones hard and rigid and adds tensile strength.

    Full Answer >
    Filed Under:
  • Q:

    What is the largest joint in the human body?

    A:

    Not only is the knee the largest joint in the human body, it is also the most complicated, according to Inner Body. The knee is a hinge joint that is formed to move only on one axis.

    Full Answer >
    Filed Under:

Explore