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slavikrds [6]
3 years ago
13

As a person exercises, the carbon dioxide level in the blood increases. Which of the following systems are signaled by the nervo

us system to respond to this increase in carbon dioxide?
digestive and immune systems

immune and respiratory systems

circulatory and excretory systems

respiratory and circulatory systems
Biology
2 answers:
dedylja [7]3 years ago
6 0
Circulatory and excretory system
Fofino [41]3 years ago
5 0

Answer:

It is the immune and respiratory system

Explanation:

Since the two systems control the lungs, veins, and the upper part of the human body.

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