Grade 4 - Science - Human Body

An adult human body has ______________ number of bones.

• 310

• 306

• 206

• 1000

• clavicle
• rib
• humerus
• scapula

• jaw
• skull
• scapula
• spine

What are the bones that protect your heart and lungs?

• rib cage
• clavicle
• femur

Your skull (cranium) is an important bone that protects your _________________?

• heart
• brain
• lungs

The Skeletal System does what?

• Support your body
• Help your body move with muscles
• all of the above
• protect your organs

Muscles are ______ and ________.

• Hard and rigid

• Inflexible and soft

• Soft and elastic

• Soft and inflexible

What happens to the skeleton as you grow?

• It grows

• I stays the same size.

• It gets smaller

Bones are made of

• Collagen

• Calcium

• Phosphorus

• All of the above

The longest bone in our body is (a)   .