Respiratory System

Put the "key events

of respiration" in the correct order.

• Carbon dioxide

  moves (diffuses) from

  blood to lungs.

• Oxygen moves (diffuses)

  from lungs to blood.

• Inhaling air containing

  oxygen.

• Exhaling air containing

  carbon dioxide.

Tags

NGSS.MS-LS1-3

T/F The structures of the respiratory system are often divided into two main groups: the upper respiratory tract and the lower respiratory tract. You

• True

• False

Which of the following statements about the nasal cavity is INCORRECT? .

• The nasal cavity lies is the hollow space behind the nose.

• The “floor” of the nasal cavity is the “roof ” of the mouth.

• The nasal cavity is lined with cells that secrete sticky mucus which work with the

  stiff hairs in the nostrils to trap dust, bacteria, and other particles that are

  inhaled with air.

• In the nasal cavity, incoming air is also warmed and moistened, which

  helps keep respiratory surfaces deep inside the lungs from drying out.

• None of the other 4 statements are INCORRECT

Tags

NGSS.MS-LS1-3

Which of the following is NOT a part of the upper respiratory system?

• nasal cavity

• trachea

• larynx

• bronchus

Which of the following is NOT a part of the LOWER respiratory system?

• nasal cavity

• lungs

• diaphragm

• bronchus

From the ​ (a)   , air flows into a tube called the trachea, or ​ (b)   . Some cells that line the trachea have hair-like ​ (c)   . Others secrete mucus. This combination of sticky mucus and cilia traps ​ (d)   and other particles and sweeps them up to the mouth. Once in the mouth, the particles are swallowed or expelled by ​ (e)   .

• larynx
• windpipe
• cilia
• pollutants
• coughing
• bronchia
• ciliots
• cilliots
• sneezing
• oxygen

Tags

NGSS.MS-LS1-2

The two soft, ​ (a)   -shaped lungs take up most of the chest cavity. The left lung is slightly ​ (b)   than the right lung, and the right lung is slightly ​ (c)   than the left lung. Grooves separate the lungs into portions called ​ (d)   . The left lung has two lobes, and the right lung has ​ (e)   lobes.

• cone
• narrower
• shorter
• lobes
• three
• kidney
• longer
• pies
• six
• four

The largest of the tubes after the trachea is the ___________.

• bronchi

• bronchus

• bronchioles

The smallest of the tubes after the trachea is the ___________.

• bronchi

• bronchus

• bronchioles

T/F - There are over 300 million alveoli, and they occupy most of the volume

of the tissue that makes up the lungs.

• True

• False