Digestive System
Breaks down food into smaller molecules your body can use
What is the digestive system?
The main function of this system is gas exchange (oxygen in, carbon dioxide out)
What is the respiratory system?
The organ that pumps blood throughout the body
What is the heart?
The control center of the body
What is the brain?
The body’s defense against pathogens
What is the immune system?
The organ where most chemical digestion occurs using enzymes and acid
What is the stomach?
Tiny air sacs in the lungs where gas exchange happens
What are alveoli?
The vessels that carry blood away from the heart
What are arteries?
Cells that transmit electrical signals
What are neurons?
White blood cells that engulf and destroy invaders
What are phagocytes?
Finger-like structures in the small intestine that increase absorption
What are villi?
The muscle that contracts to allow you to inhale
What is the diaphragm?
The part of blood responsible for fighting infections
What are white blood cells?
This long structure carries messages from the brain down your back
What is the spinal cord?
Proteins that recognize and bind to specific antigens
What are antibodies?
This organ absorbs water from leftover food
What is the large intestine?
This tube carries air into your lungs
What is the trachea?
The circuit that carries blood between the heart and lungs
What is pulmonary circulation?
The insulating layer that speeds up nerve impulses
What is the myelin sheath?
The body’s ability to remember and respond faster to previously encountered pathogens
What is immunological memory?
A substance produced by the liver that helps break down fats
What is bile?
You breathe out this waste gas
What is carbon dioxide?
These tiny vessels connect arteries and veins
What are capillaries?
This system includes the brain and spinal cord
What is the central nervous system?
A weakened or inactive form of a pathogen used to build immunity
What is a vaccine?