Red Blood Cell
A Cell That Carries Oxygen Using Hemoglobin In The Circulatory System.

Hemoglobin
A Protein In Red Blood Cells That Binds Oxygen.

Action Potential
An Electrical Signal That Travels Along The Axon Of A Neuron.

Respiratory System
An Organ System Responsible For Gas Exchange, Supplying Oxygen And Removing Carbon Dioxide.

Central Nervous System
The Part Of The Nervous System Consisting Of The Brain And Spinal Cord.

Lung
A Primary Organ Of The Respiratory System Where Gas Exchange Occurs.

Peripheral Nervous System
The Part Of The Nervous System Outside The Brain And Spinal Cord.

Alveolus
A Tiny Air Sac In The Lungs Where Oxygen And Carbon Dioxide Are Exchanged.

Reflex Arc
A Neural Pathway That Controls A Rapid, Automatic Response To A Stimulus.

Diaphragm
A Muscle Beneath The Lungs That Controls Breathing In The Respiratory System.