This structure is called the epiglottis. This flexible leaf-shaped cartilage serves as a flap that covers the larynx to prevent food and liquids from entering the airway and the lungs. It is open when we breathe which allows air to enter into the larynx.
The right answer is HEPA filter.
A HEPA filter (High Efficiency on Particles Air) can filter up to 99.97% of 0.3μ aerial particles.
These filters are used to clean the air and retain suspended particles (dust, pollen, bacteria etc.) and other particles that can cause respiratory allergy in sensitive subjects.
They are very used in sterile rooms
Patients are encouraged to drink clear liquids (for example, water) until 2 hours before the time they are scheduled to arrive to the hospital or surgery center. remember, staying hydrated is important. However, certain procedures may require specific instructions.
I hope this answers your question.
Answer:
transport across membranes is called diffusion.
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Answer:
stamen produces pollen ovules develops into fruit
Explanation:
