mommycat
Well-known member
I was looking for something else and ended up on a tangent.
http://www.merck.com/mmpe/sec19/ch269/ch269b.html
http://www.securatot.co.uk/why-rear-facing-is-safer
http://www.idrawdigital.com/2009/01/drawing-the-human-form-proportions-from-child-to-adult/
http://www.merck.com/mmpe/sec19/ch269/ch269b.html
http://wiki.answers.com/Q/What_is_the_weight_of_an_adult_human_headHead circumference: Head circumference reflects brain size and is routinely measured up to 2 yr. At birth, the brain is 25% of adult size, and head circumference averages 35 cm. Head circumference increases an average 1 cm/mo during the 1st yr; growth is more rapid in the 1st 8 mo, and by 12 mo, the brain has completed half its postnatal growth and is 75% of adult size. Head circumference increases 3.5 cm over the next 2 yr; the brain is 80% of adult size by age 3 yr and 90% by age 7 yr.
(~10lbs)An adult human cadaver head cut off around vertebra C3, with no hair, weighs on average somewhere between 4.5 and 5 kg, typically constituting around 8% of the body mass.
http://www.securatot.co.uk/why-rear-facing-is-safer
A child’s proportions are different from that of an adult. A child’s head weighs 25% of their total body weight compared to an adult, which is 6%.
http://www.idrawdigital.com/2009/01/drawing-the-human-form-proportions-from-child-to-adult/