Explore the Human Respiratory System

What is the main function of the human respiratory system?

• To regulate body temperature through sweating.

• To produce hormones that control metabolism.

• To facilitate gas exchange (oxygen and carbon dioxide) between the body and the environment.

• To filter and purify blood before it circulates.

Name the primary organs involved in the respiratory system.

• Skin, muscles, bones

• Kidneys, bladder, pancreas

• Nose, pharynx, larynx, trachea, bronchi, lungs

• Heart, stomach, liver

What role do the lungs play in the respiratory process?

• The lungs store oxygen for later use.

• The lungs facilitate gas exchange, providing oxygen to the blood and removing carbon dioxide.

• The lungs produce hormones that regulate breathing.

• The lungs filter toxins from the blood.

Describe how gas exchange occurs in the lungs.

• Oxygen is stored in the lungs until needed by the body.

• Carbon dioxide is absorbed by the alveoli and released into the air.

• Gas exchange occurs in the alveoli of the lungs, where oxygen enters the blood and carbon dioxide is removed.

• Gas exchange occurs in the trachea where air is filtered and warmed.

What is the importance of oxygen in the breathing process?

• Oxygen is vital for cellular respiration, providing energy for bodily functions.

• Oxygen is a waste product of cellular respiration.

• Oxygen helps in the absorption of nutrients.

• Oxygen is only needed for digestion.

List one common respiratory disease and its effect on health.

• Hypertension

• Arthritis

• Diabetes

• Asthma

How does the diaphragm assist in breathing?

• The diaphragm assists by pushing air out of the lungs without any muscle movement.

• The diaphragm contracts to decrease lung volume during inhalation.

• The diaphragm assists in breathing by contracting to increase lung volume during inhalation and relaxing to decrease lung volume during exhalation.

• The diaphragm helps by filtering air before it enters the lungs.

What is the process of inhalation?

• Exhalation is the process of taking air out of the lungs.

• Inhalation occurs when the lungs contract and the thoracic cavity shrinks.

• Inhalation is the process of filtering air through the nasal passages only.

• Inhalation is the process of taking air into the lungs by expanding the thoracic cavity, primarily through diaphragm contraction.

Why is it important to breathe through the nose rather than the mouth?

• Mouth breathing helps filter and warm the air better.

• Breathing through the mouth increases oxygen absorption.

• It is important to breathe through the nose because it filters and warms the air, regulates airflow, and enhances oxygen absorption.

• Nasal breathing is less effective for regulating airflow.

What happens to carbon dioxide during gas exchange?

• Carbon dioxide is converted into oxygen in the lungs.

• Carbon dioxide is absorbed by the blood from the alveoli.

• Carbon dioxide is stored in the muscles during gas exchange.

• Carbon dioxide diffuses from the blood into the alveoli and is exhaled.