Biology STAAR (State of Texas Assessments of Academic Readiness) Practice Test

Disable ads (and more) with a membership for a one time $2.99 payment

Study for the Biology STAAR Test. Improve your skills with flashcards and multiple choice questions, each question is accompanied by hints and explanations. Prepare for success!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which organ is primarily involved in the process of inhalation?

Heart
Liver
Lungs
Kidney

The correct answer is: Lungs

The lungs are the organs primarily responsible for the process of inhalation. During inhalation, the diaphragm and intercostal muscles contract, expanding the thoracic cavity and lowering the pressure within the lungs relative to the outside atmosphere. This pressure difference allows air to flow into the lungs. The lungs contain alveoli, which are tiny air sacs where gas exchange occurs, bringing oxygen into the bloodstream and removing carbon dioxide. This vital role makes the lungs central to the respiratory process, highlighting their function in facilitating inhalation effectively. Other organs, such as the heart, liver, and kidneys, play crucial roles in the body's overall function, but they are not directly involved in the mechanics of breathing.