SCIENCE 5

A disease marked by breathlessness that is brought on by enlargement of the alveoli in the lungs

• lung cancer

• sinusitis

• coughing

• emphysema

How many breaths will a person take per hour if she/he breaths 20,000 times in a day?

• 834

• 934

• 832

• 932

Main organ of the respiratory system

• lung

• lungs

• diaphragm

• diaphragms

The most abundant element in the environment

• nitrogen

• hydrogen

• oxygen

• carbon dioxide

The process by which human body takes in oxygen and releases carbon dioxide

• coughing

• inhalation, exhalation

• respiratory system

• respiration

Both lungs have how many alveoli

• 600billions

• 600millions

• 500millions

• 500billions

It is the mechanical process of inhaling and exhaling air.

• breathing

• respiration

• respiratory system

• inhalation, exhalation

The gateway of the respiratory system

• ears

• eyes

• nose

• mouth

COVID 19 is also a respiratory disease

• not sure

• no

• maybe

• yes

Opening into the nasal passages that are lined with hairs

• larynx

• pharynx

• nostrils

• cilia