Skeletal System
Muscular System
Circulatory System
Respiratory System
Nervous System
100

What is the main function of bones?

To support and protect the body, and produce blood cells.

100

What is the function of muscles?

To allow movement of the body.

100

What does the heart do?

Pumps blood throughout the body.

100

What is the primary organ of respiration?

The lungs.

100

What is the main function of the nervous system?

To control and coordinate body activities.

200

How many bones are in the adult human body?

206 bones.

200

What are the three types of muscles?

Skeletal, smooth, and cardiac muscles.

200

What are the main components of blood?

Red blood cells, white blood cells, platelets, and plasma.

200

 What gas do we inhale?

Oxygen.

200

What are neurons?

The basic units of the nervous system that transmit signals.

300

What is the name of the bone that protects the brain?

The skull.

300

What type of muscle is found in the heart?

Cardiac muscle.

300

What is the function of veins?

To carry blood back to the heart.

300

What process do we call breathing in and out?

Respiration.

300

What part of the brain controls balance?

The cerebellum.

400

What is the longest bone in the human body?

The femur.

400

 How do muscles work in pairs?

When one muscle contracts, the other relaxes to allow movement.

400

How does oxygen get from the lungs to the blood?

Through the process of diffusion in the alveoli.

400

How does the diaphragm assist in breathing?

It contracts to create a vacuum that pulls air into the lungs.

400

What is the spinal cord's role?

To transmit signals between the brain and the rest of the body.

500

What are the two main types of bone?

Compact bone and spongy bone.

500

What is the term for a muscle that relaxes?

Antagonist.

500

What is the largest artery in the body?

The aorta.

500

What is the function of the alveoli?

To exchange oxygen and carbon dioxide with the blood.

500

How do reflex actions work?

They occur through a quick, automatic response to a stimulus without involving the brain.

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