Multiple Choice
Which of the following gases helps form Earth's protective shield known as the ozone layer?
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1. Introduction to Biology
Introduction to Biology
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Which body system is primarily responsible for adding oxygen to the blood?
A
Nervous system
B
Respiratory system
C
Endocrine system
D
Digestive system
Verified step by step guidance1
Step 1: Begin by identifying the primary function of each body system listed in the options. For example, the nervous system is responsible for transmitting signals throughout the body, the endocrine system regulates hormones, and the digestive system processes food for energy and nutrients.
Step 2: Recall the role of the respiratory system. It is primarily responsible for gas exchange, where oxygen is added to the blood and carbon dioxide is removed. This occurs in the lungs through structures called alveoli.
Step 3: Understand the process of oxygenation. Oxygen from inhaled air diffuses across the alveolar membrane into the capillaries, where it binds to hemoglobin in red blood cells, thus adding oxygen to the blood.
Step 4: Compare the functions of the listed systems to determine which one aligns with the process of adding oxygen to the blood. The respiratory system is the only system directly involved in this process.
Step 5: Conclude that the correct answer is the respiratory system, as it is the system responsible for oxygenating the blood through the process of respiration.
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