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The kidneyslungs airwaysred blood cells allow air to reach the lungs.
The airwaykidneybrain diaphragm is the muscle that expands and contracts, allowing air to fill the chest cavity.
Select the best answer to complete each sentence. Respiration occurs inside the lungsliverheartbrain.
Read the scenarios below. Choose the scenario that could interfere with a person's ability to breathe freely.
Which of the following is the main passage of air for the lungs?
Which are the three components of ventilation?
The tracheamouthmedullalarynx is a part of the brain that sends signals to the diaphragm, causing inhalation.
What do the epithelial cells do to the air that comes into the body? Select all that apply.
Diffusion of oxygen into the lungs occurs when:
What is it about the structure of the alveolar-capillary unit that makes diffusion possible? Select all that apply.
Which are the main components of the circulatory system?
Which of the following are types of blood vessels?
Complete each sentence.Hemoglobin is the part of proteinlungsblood vesselsred blood cells that attaches to oxygen and carbon dioxide on its way around the body.
The diaphragm muscle sits below the lungs and continuously expands and contracts. What happens in the chest cavity as a result of this expansion and contraction?
What is the difference between inhalation and exhalation?
When receptors in the alveolinosemedullabronchioles detect inhalation, they send signals back to the brain, which causes exhalation.
Why does the air taken into the body need to be heated and humidified?
The amount of carbon dioxide and oxygen is measured by the body at the alveolar-capillary interfacebronchiolesepithelial cellsgas exchange.
What happens after the respiratory system moves oxygen into the blood?
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