Lesson 2.1 Skeletal System

John is a medical student studying human anatomy. He needs to remember the number of bones in the human body for his upcoming exam. Can you tell him how many bones are there in the human body?

• 202

• 204

• 206

• 208

A gymnast is able to bend and twist her body in various ways during her routine. This is possible because her bones are designed to be flexible.

• True

• False

During a soccer game, John felt a sharp pain at a location where his two leg bones meet. What is this location called?

• cartilage

• phosphate

• joint

• ligament

During a gymnastics routine, the gymnast's flexibility in their bones is primarily due to

• cartilage

• collagen

• calcium

• phosphate

Imagine you are building a human body model. What would you use to represent the ligaments?

• Strings to make more bones

• Strings to hold joints together

• Strings that turns into bone tissue

• Strings that makes bones hard

John broke his arm while playing football. The doctor explained that the hard quality of his bones is due to calcium and __________.

• collagen

• ligaments

• phosphate

• cartilage