3.6 Respiratory sytem Flashcards
What are the features of the respiratory system
The respiratory system begins when the air enters the mouth and nose , pharynx, trachea, bronchi , lungs
what are the 5 things that happen when air enters explain ?
Mouth and nose : passes through pharynx
Pharynx: goes down to the trachea
Trachea also known as the windpipe it separates into 2 small branches called the bronchi
Bronchi deliveries air to the lungs
Lungs where gas exchange appends
: How do the respiratory and circulatory systems work together?
The respiratory system brings oxygen into the lungs, while the circulatory system delivers it to the body. The circulatory system also carries carbon dioxide back to the lungs to be exhaled.
: How does gas exchange occur in the lungs?
Gas exchange happens by diffusion: oxygen moves from the alveoli into the blood, and carbon dioxide moves from the blood into the alveoli to be exhaled.
Which of the following structures is the primary site of gas exchange in the lungs?
) Alveoli
Gas exchange in the lungs occurs through the process of diffusion.
True
Explain why the alveoli have thin walls and a large surface area.
Thin walls and a large surface area allow for efficient gas exchange by making diffusion faster.
Describe how the respiratory and circulatory systems work together to deliver oxygen to the body and remove carbon dioxide.
The respiratory system brings oxygen into the lungs, where it diffuses into the blood. The circulatory system carries this oxygen to the body’s cells and brings carbon dioxide back to the lungs to be exhaled.
A person has damaged alveoli from smoking. How might this affect their ability to perform gas exchange?
Damaged alveoli reduce surface area, making gas exchange less efficient. This can lead to low oxygen levels in the blood and difficulty removing carbon dioxide.
