Unit 3 Lesson 1 Review

What is the skeletal system made up of?

• spinal cord

• bones, the skeleton

• lungs

• heart

Why is the skeletal system is important to the human body.

• We can't live without it

• It helps us breathe

• The skeleton supports the human body, and it protects important organs in the human body.

• It takes care of our skin

What are animals with backbones called?

• amphibians

• reptiles

• birds

• vertebrates

Are humans and other mammals vertebrates or invertebrates?

• vertebrates

• invertebrates

Do we have an exoskeleton?

• yes

• no

What are cells?

• Small tissues

• bones

• Cells are building blocks of life

• muscles

Which are examples are organs?

*Select ALL that apply

• kidneys

• heart

• lungs

• stomach

Why are human bodies compared to complex machines?

• It has a heart

• There are many veins

• It is like a computer

• It is composed of several different systems that do specific jobs.