1. red blood cells
   muscle cells
2. nerve cells
   skin cells

Red blood cells carry oxygen to all parts of the body. This is called internal respiration and as the name suggests, it happens internally as the red blood cells distribute the oxygen throughout the body.

1. nasal cavity
   diaphragm
2. mouth
   bronchi

The diaphragm controls your breathing. As it expands and contracts, it causes the lungs to push air in and out to make you breathe.

1. Diabetes
   Eczema
2. Ulcers
   Asthma

Asthma is an illness that affects the respiratory system. When an episode is taken, the airways tighten and cause the individual to cough and wheeze until treated.

1. hydrogen & carbon dioxide
   fluorine & argon
2. chlorine & oxygen
   oxygen & carbon dioxide

Oxygen and carbon dioxide pass through the respiratory system. The two gases get exchanged based on whether the person is inhaling or exhaling.

1. Bronchi
   Ears
2. Tibula
   Fingers

The bronchi is part of the respiratory system. The bronchi carry the air down into the lungs after it leaves the trachea.

1. 16 - 20 breaths per minute
   40 - 50 breaths per minute
2. 25 - 30 breaths per minute
   5 - 8 breaths per minute

The average resting respiratory for adults is 16 - 20 breaths per minute. Anymore or less can indicate deeper problems or ailments in the body.

1. True
2. False

This is true. The right lung is larger than the left lung. The left lung is smaller due to the fact that it needs to leave room for the heart, also located on the left.

1. larynx
   lungs
2. trachea
   sinuses

Sinuses control the temperature of the oxygen that we breathe in. Before it can move on to the lungs, the air passes through the sinus which warms the air up before it continues.

1. One
   Two
2. Three
   Four

The right lung has three lobes that supply blood to the organ. In contrast, the left lung has two, but it is also smaller than the right.

1. dead air
   perma-air
2. stuck air
   residual volume

Residual volume is the word used for this. It refers to any air that does not leave your lungs when you exhale. It is important and used to judge the health of your lungs.

1. 10 - 15 breaths per minute
   5 - 15 breaths per minute
2. 20 - 40 breaths per minute
   50 - 60 breaths per minute

The average resting respiratory rate for babies is 20 - 40 breaths per minute. As kids get older, their respiratory rate gradually slows down.

1. mouth
   ears
2. eyes
   lungs

The mouth is used to breathe if your nasal cavity is not able to be used. Breathing through the mouth can be used in situations where your nose is blocked by mucus or other factors.

1. a filter
   an air tank
2. a tube for particles
   a voice box

The larynx is where your voice comes from. It is part of the respiratory system, as it is another avenue that the air must pass through to get to the lungs.

1. a part of the respiratory system
   gasses
2. an illness
   regular breathing

Eupnea is another word to describe regular breathing. It refers to the correct resting respiratory rate that someone should have based on their age and health.

1. True
2. False

This is false. A sneeze happens as a result of something irritating the inside of the nose. The rapid release of air is triggered by the brain and it is meant to clear out the irritant.

1. mouth
   larynx
2. alveolus
   trachea

The alveolus exchanges the gases that are inhaled. When alveoli receive blood with carbon dioxide, it exchanges that blood with oxygen to continue on.

1. It is no longer oxygen.
   It is contaminated.
2. It hasn't reached the alveoli.
   It is filled with particles.

This air is called "dead space" because it hasn't reached the alveoli and stays in the airways. Since it hasn't reached the alveoli, it is unable to be exchanged into a different gas and move on.

1. water
   pollen
2. cells
   nothing

Water is lost when exhaling. The water comes out when we breathe in the form of water vapor and it can add up to around 400 liters per day.

1. 20 liters
   50 liters
2. 6 liters
   40 liters

An adult lung can hold up to 6 liters of air. However, this capacity is not typically reached in normal breathing or from one single breath.

1. larynx
   mouth
2. trachea
   alveoli

The trachea is the part that acts as a filter. The trachea only allows air to pass through, and stops anything that is not meant to pass into your lungs.

1. air filling up in the lungs
   your heart
2. muscles in your chest
   nothing

Contrary to how it may seem, lungs do not make your chest expand when you breathe. It is actually the muscles in your chest that cause the movement.

1. lungs
   larynx
2. trachea
   nose

Lungs can float in water due to the air pockets that they have. However, if the lungs aren't filled with air, they do not float.

1. 100
   80,000,000
2. 3,000
   22,000

In a day, the average adult takes around 22,000 breaths each day. Volumes of around 10,000 liters of air are consumed every day by adults.

1. lungs
   alveoli
2. mouth
   nose hairs

Nose hairs stop the the particles from being inhaled. Did you know that nose hairs actually decrease the risk of developing asthma?

1. a vital organ
   cartilage
2. air
   fluid

Epiglottis is a piece of cartilage that blocks anything that should not enter the windpipe. If something enters the area that shouldn't, choking is usually induced.

1. a severe case of hypoxia
   a piece of tissue
2. another name for tonsils
   a fluid

Anoxia is a very severe case of hypoxia. When someone is affected by anoxia, they have a complete cutoff of oxygen to their organs.

1. True
2. False

This is true. Women as well as children both breathe faster than men do. However, the difference between the two respiratory rates is not drastically different.

1. bronchial muscles
   nose
2. trachea
   nasal cavity

Bronchial muscles don't have any benefits for healthy humans. These muscles are also affected when someone contracts bronchitis.

1. It shuts down.
   It compromises with the amount of oxygen.
2. It exchanges the left over carbon dioxide.
   It makes you yawn.

When you don't have enough oxygen, your body makes you yawn. Yawning brings more oxygen inside the body when your body feels that it is lacking it.

1. running
   cleaning
2. smoking
   drinking

Smoking can stop the growth of teen's lungs in addition to many other symptoms and problems. Smoking causes a lot of damage to otherwise healthy lungs.

1. Unique Respiratory Time
   Unknown Retaliation Time
2. Upper Respiratory Tract
   Unique Riding Track

URT stands for "upper respiratory tract", which refers to the upper organs of the system such as the nose and mouth. In contrast, LRT stands for "lower respiratory tract".

1. True
2. False

This is true. When the diaphragm suddenly moves out of its natural rhythm, it causes the body to get hiccups. Aside from this cause, there are many other factors that can also affect hiccups.

1. an organ
   a type of cell
2. a lack of oxygen in tissue
   a part of the respiratory system

Hypoxia is a lack of oxygen in body tissue. This is a serious condition as it can cause problems in your main organs which can lead to permanent damage.

1. circulatory system
   muscular system
2. nervous system
   skeletal system

The circulatory system works most with the respiratory system. Blood circulating through the body needs oxygen from the respiratory system in order to function properly.

1. Emphysema
   pneumonia
2. cancer
   common cold

The common cold is the most common illness to affect the respiratory system. The cold can affect the nose as well as the throat, which can affect the regular functions of the respiratory system.