Multiple Choice
What is true of an individual who is lacking a thymus?
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21. The Immune System
Introduction to the Immune System
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Which system is primarily responsible for protecting the body against pathogens?
A
Immune system
B
Respiratory system
C
Digestive system
D
Nervous system
Verified step by step guidance1
Begin by identifying the primary function of each system listed in the options.
The immune system is responsible for defending the body against pathogens such as bacteria, viruses, and other foreign invaders.
The respiratory system is primarily involved in gas exchange, bringing oxygen into the body and removing carbon dioxide.
The digestive system is responsible for breaking down food into nutrients that the body can use for energy, growth, and repair.
The nervous system is responsible for controlling and coordinating body activities by transmitting signals throughout the body.
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