Human body systems
Muscular system
Nervous system
Circulatory System
Skeletal System
100

This system is responsible for transporting nutrients, gases, and waste throughout the body.

What is the circulatory system?

100

This muscle is found in the heart and is responsible for pumping blood.

What is cardiac muscle?

100

The central nervous system consists of these two main structures.

What are the brain and spinal cord?

100

his vessel carries oxygenated blood away from the heart.

What is the aorta?

100

This bone is the longest and strongest in the human body.

What is the femur?

200

The primary function of this system is to protect the body from infection and disease.


What is the immune system?

200

These muscles are under voluntary control and are responsible for body movements like walking or lifting objects.

What are skeletal muscles?

200

These nerve cells transmit electrical signals throughout the body.

What are neurons?

200

These blood cells are responsible for carrying oxygen throughout the body.

What are red blood cells?

200

The axial skeleton includes this bony structure that houses and protects the brain.

 What is the skull?

300

 This system controls and coordinates all body activities by transmitting electrical signals through neurons.

What is the nervous system?

300

The muscle responsible for closing the jaw during chewing is the...

What is the masseter?

300

The part of the brain responsible for regulating basic life functions such as heartbeat and breathing is the…

What is the brainstem?

300

The small blood vessels where the exchange of gases, nutrients, and waste products occurs are called…

What are capillaries?

300

This joint type allows for rotational movement, such as the turning of the head.

What is a pivot joint?

400

This system is responsible for breaking down food and absorbing nutrients.

What is the digestive system?

400

This muscle is located on the back of the upper arm and is responsible for extending the elbow.

What is the triceps brachii?

400

This part of the brain is involved in higher cognitive functions such as thinking, reasoning, and memory.

 What is the cerebrum?

400

This organ filters and removes waste products from the blood.

 What are the kidneys?

400

The bone that forms the forehead and part of the eye sockets is called the…

What is the frontal bone?

500

This system is responsible for producing offspring and includes organs such as the ovaries, testes, and uterus.

What is the reproductive system?

500

This large muscle in the upper leg is responsible for extending the knee.

What is the quadriceps femoris?

500

 The autonomic nervous system is divided into two parts: the sympathetic and this other division that conserves energy.

What is the parasympathetic nervous system?

500

The pacemaker of the heart, responsible for initiating the heartbeat, is located in this part of the heart.

What is the sinoatrial (SA) node?

500

This connective tissue connects muscles to bones.

What are tendons?