Lesson Worksheet: The Human Breathing System Science

In this worksheet, we will practice identifying and describing the function of the organs of the human respiratory system, and outlining the process of gas exchange in the alveoli.

Q1:

What process describes the formation of liquid water drops when you exhale into a cold environment?

  • ACondensation
  • BDehydration
  • CEvaporation
  • DPrecipitation

Q2:

The figure shows how much of different gases (shown as colors) is present in inhaled and exhaled air.

What is gas X?

  • ACarbon dioxide
  • BOxygen
  • CNitrogen
  • DWater vapor

What is gas Y?

  • ANitrogen
  • BOxygen
  • CCarbon dioxide
  • DWater vapor

What process causes the changes in the gas composition shown in the pie charts?

  • ARespiration inside the lungs
  • BRespiration inside body cells
  • CCondensation inside body cells
  • DPhotosynthesis inside body cells
  • EDifferences in temperature inside and outside the body

Q3:

The figure shows part of the human respiratory system.

What is present in box A?

  • ABone and muscle
  • BBone and air sacs
  • CMuscle and air tubes
  • DBone and mucus
  • EMuscle and mucus

Q4:

How does oxygen get transported from the lungs to the body cells?

  • ADissolved in plasma
  • BDissolved in the cytoplasm of white blood cells
  • CIn red blood cells, attached to hemoglobin
  • DIn plasma, attached to hemoglobin
  • EIn white blood cells, attached to hemoglobin

Q5:

What part of your skeleton protects the lungs?

  • ASpine
  • BPelvis
  • CSkull
  • DRib cage

Q6:

What happens during gas exchange in the lungs?

  • AOxygen diffuses into the alveoli and carbon dioxide diffuses into the blood.
  • BOxygen diffuses into the blood and carbon dioxide diffuses into the alveoli.
  • COxygen diffuses into the blood and nitrogen diffuses into the alveoli.
  • DNitrogen diffuses into the blood and oxygen diffuses into the alveoli.
  • EWater diffuses into the blood and carbon dioxide diffuses into the alveoli.

Q7:

The figure shows part of the human respiratory system.

Which structure is the diaphragm?

  • AD
  • BB
  • CE
  • DA
  • EC

In which structure are ciliated cells found?

  • AA
  • BC
  • CB
  • DD
  • EE

Q8:

Complete the sentence: When you breathe in, you take in from the air for your cells to carry out respiration.

  • Aoxygen
  • Bwater vapor
  • Cnitrogen
  • Dcarbon dioxide

Q9:

What is another name for the breathing system?

  • ANervous system
  • BDigestive system
  • CCirculatory system
  • DRespiratory system
  • ESkeletal system

Q10:

The figure shows a cross section through the lungs.

What is structure A?

  • ATrachea
  • BAlveolus
  • CBronchus
  • DBronchioles
  • EDiaphragm

What is structure B?

  • ADiaphragm
  • BAlveolus
  • CTrachea
  • DBronchus
  • EBronchioles

This lesson includes 3 additional questions for subscribers.

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.