SCIENCE 4

The _________is the framework of the human body.

• skeleton

• heart

• skull

• bones

An adult has about ______ bones that make up 20 percent of his total weight.

Babies are born with about ______ bones.

Bones are constantly renewed throughout our lives through a process called _____________

• absorption

• resorption

• conduction

• electrification

The hardest bone in the body is ________. It protects the brain.

The middle part of the body is supported by the ________ at the back and by the __________ in front.

Our spine is made up of ring-shaped bones called _________.

___________ protects the spinal cord where many nerves from the brain are connected and lead to different body parts.

Vertebrae is also called ___________

How many pairs of ribs protects our internal organs?

• 13

• 11

• 12

• 15