Unit 3 Lessons 1 The Skeletal System and Lesson 2 All about Bone

Julia, Maylani, and Sophia are playing a trivia game. They come across a question: Which system in our body is responsible for providing support and protection to our organs?

• nervous system

• skeletal system

• muscular system

• digestive system

Abigail, Anabel, and Zoey are having a debate! They're trying to figure out how many bones are in the human body. Can you help them? There are more than ____ bones in your body.

• 200

• 175

• 800

• 300

Sophia, Abigail, and Charles are discussing the important job of our skull or cranium. What do you think is the main function of the skull?

• It helps our pelvis work better.

• It protects your brain.

• It helps us scare people at Halloween.

• It heals a broken bone.

Enoch, Jayden, and Kayleen are discussing the functions of the skeletal system. Which of the following is NOT a function they mention?

• Supporting the body

• Producing blood cells

• Storing minerals

• None of the above

AJ, Michael, and Anabel are playing a trivia game. They come across a question: What is a vertebrae?

• Like verbs, they are action words.

• The smaller bones in the spinal column.

• The small bones in your leg.

• One of your organs.

Layla A, Layla G, and Abdiel were asked to identify a bone that is NOT in the human body. Can you help them out?

• fibula

• tibia

• xrays

• sternum

Abigail, Delilah, and Maria are learning about the human body. They are curious about the ribcage. What is the function of the ribcage?

• To help with digestion

• To regulate body temperature

• To support the spine

• To protect organs in the chest like your heart and lungs.

Hey Julie, Enoch, and Charles! Can you guess the important job of marrow cells?

• They help you to become strong when you lift weights.

• They pump out red blood cells. Then, the red blood cells carry oxygen all around the body.

• They help us to be smarter if we have more than others.

• They are made by Dr. Marrow because he was very smart.

What are the three systems that we are covering in this unit?​ (a)   ​ (b)   ​ (c)   ​

• the skeletal system
• the muscular system
• the nervous system
• the multiple system
• the body system
• the bones system

Makayla, Michael, and Osiris are having a debate. Makayla says the human skull has a set of 20 bones, but Michael thinks it's 22. Ava isn't sure. Who is correct?