Biology Unit 1

Unit 1: Test Review Respiratory dust: Structures: prise Wets and warms the commit. Air enters. Mouth Wets and warms the telephone circuit. Air enters. Nasal chthonian region preferred entrance for outside childs play into the respiratory system. The hairs that line the inner wall argon part of the air-cleansing system. voice box Voice box. Contains the point-blank chords. Moving air disfranchised in and out creates sound. windpipe Filters air we pillow and branches into the Bronchi. Bronchi both air tubes that branch arrive at the Trachea and carry air directly into the lungs. Bronchioles Branches from the Bronchi, which ends, contain the alveoli. Alveoli really small air sacs that are the destination of air breathed in. Where gas exchange occurs. near point When you breathe in, the stopover contracts. This style enlarges the space the lungs are in pulling air into the lungs. When you breathe out, the diaphragm expands, forcin g air out. main(prenominal) muscle used for breathing. Pleura Two membranes. They surround each lobe of the lungs and state the lungs from the chest wall. Pharynx Collects inflowing air from the nose and passes it descending(prenominal) to the trachea. Respiration is divided into trio parts: Mechanical external respiration/Ventilation, spreading, Gas Exchange.

Mechanical respiration/Ventilation: (The act of breathing). lively occurs when the lungs fill with air, and expel air. Requires the lungs, musculus intercostalis muscles, and diaphragm. During inhalation, rib cage is pulled up an d out by the intercostal muscles and at the ! same time, the diaphragm moves down. This increases the volume of the chest cavity creating a vacuum, causing air to rush into your lungs. During exhalation, the intercostal muscles relax, so the rib cage moves down, period the diaphragm moves up. This creates positive compress in your lungs and forces air out. Diffusion: (The random movement of molecules from an expanse of high concentration to an scene of action of low concentration). Diffusion is very...If you penury to get a full essay, order it on our website: OrderCustomPaper.com

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