bones and muscles

What is the main function of the skeleton?

• to protect internal organs

• to support the body's structure

• to shape our body

• all are correct

which bone protect the brain?

• skull

• spine

• radius

• femur

what is the name of the long bone in the upper arm?

• radius

• tibia

• humerus

• ulna

which part of the skeleton protects the heart and lungs?

• hip

• rib cage

• jaw

• fibula

what the function of jaw?

• help us to walk

• help us to stand up straight

• help us to jump

• help us to eat and talk

what happens to the biceps when you bend your elbow?

• it contracts

• it relax

• it remains the same

• it broken

what happens to the triceps when you bend your elbow?

• it contracts

• it relaxes

• it remains the same

• it rotates

what does it mean when a muscle contracts?

• it gets longer

• it gets shorter

• it stays the same

• it disappears

which muscle contracts when you straighten your arm?

• biceps

• triceps

• both

• neither

what is the main characteristic of vertebrate?

• they have an exoskeleton

• they lay eggs

• they live in water

• they have a backbone