The Respiratory System
Grade 6 · Science · Body Systems · Maine, USA
Lesson Summary
The respiratory system brings oxygen into the body and removes carbon dioxide through breathing.
Explanation
When you breathe in, air enters through your nose or mouth, travels down the trachea (windpipe), and reaches the lungs through bronchial tubes. Inside the lungs, air reaches tiny sacs called alveoli, where oxygen passes into the blood and carbon dioxide passes out of the blood. When you breathe out, you release the carbon dioxide. The diaphragm, a dome-shaped muscle below the lungs, contracts and relaxes to control breathing. The respiratory system works closely with the circulatory system to keep every cell in your body supplied with oxygen.
Practice Questions
Q1: What gas do you breathe in, and what gas do you breathe out?
Answer: You breathe in oxygen and breathe out carbon dioxide.
Q2: What are alveoli, and what is their function?
Answer: Alveoli are tiny air sacs in the lungs where oxygen and carbon dioxide are exchanged between the air and the blood.
Q3: What role does the diaphragm play in breathing?
Answer: The diaphragm is a muscle that contracts to pull air into the lungs and relaxes to push air out.
People Also Ask
What is The Respiratory System in Grade 6 Science?+
The Respiratory System is a lesson in the Body Systems chapter of Grade 6 Science. It is part of the Maine, USA school curriculum and covers key concepts that students need to understand at this level.
What grade level covers The Respiratory System?+
The Respiratory System is taught in Grade 6 as part of the Science curriculum in Maine, USA.
How can I help my child with Body Systems in Science?+
Start with the lesson summary and explanation on this page. Practice the questions provided, then use TutorTom for personalized, step-by-step help with Body Systems topics.