Which gases does the body inhale and exhale during respiration?
What is the movement of gases into and out of the bloodstream called?
Select the best answer to complete each sentence. Respiration occurs inside the ✔ lungsliverheartbrain.
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.
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Which of the following is the main passage of air for the lungs?
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?
Which are the three components of ventilation?
What is the difference between inhalation and exhalation?
The is a part of the brain that sends signals to the diaphragm, causing inhalation. When receptors in the detect inhalation, they send signals back to the brain, which causes exhalation.
When receptors in the detect inhalation, they send signals back to the brain, which causes exhalation.
When a person has been holding his or her breath for too long, the brain will force the person to breathe before a dangerous amount of builds up in the bloodstream.
What do the epithelial cells do to the air that comes into the body? Select all that apply.
Why does the air taken into the body need to be heated and humidified?
Diffusion of oxygen into the lungs occurs when:
The amount of carbon dioxide and oxygen is measured by the body at the ✔ alveolar-capillary interfacebronchiolesepithelial cellsgas exchange.
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?
What happens after the respiratory system moves oxygen into the blood?
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