Body Systems

How many bones are there in the human body?

The ____________ protect the lungs and heart.

The biggest bone in the body is_____________.

The longest bone in our body is called ___________.

The pelvis protects the ________________.

The first organ in the digestion process is ____________.

The ___________________ absorbs the nutrients in the food.

How many muscles do we have?

What substance do humans have inside bones that produces more blood cells?

• bone marrow

• cartilage

• blood

This a short band that attaches bones together at the joint.

• cartilage

• tendon

• ligament

• joint