Respiratory System Biology 322 Human Anatomy. V G GV G G Anatomical Structures Support Specific Functions of Respiratory System Ventilation: Movement.

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Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings The primary function of the respiratory system is to allow oxygen from the air.
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Respiratory System Biology 322 Human Anatomy

V G GV G G Anatomical Structures Support Specific Functions of Respiratory System Ventilation: Movement of air to and from sites of gas exchange Gas Exchange: Movement of specific gases such as oxygen & carbon dioxide between air and blood (in lung) or between blood and extracellular fluids (in other tissues) Gas Transport: Movement of oxygen (in blood) away from lung and of carbon dioxide (also in blood) back toward lung.

Organs of Respiratory System

Lungs

Nasal Cavity: Removes dust & other debris Warms inhaled air Humidifies inhaled air

Right & left sides of nasal cavity separated by nasal septum; Nasal cavity separated from oral cavity by palate

Structure of Larynx: Nine cartilages: 3 large unpaired 3 smaller pairs You identifed these in lab

Vocal cordsVocal cords (also called or ) are strands of dense regular connective tissue running anteriorly from to. If they are adducted (close together) air moving between the cords causes them to vibrate.

Intrinsic muscles of larynx (no, you don’t need to know their names) move

Trachea: Begins at bottom of larynx (cricoid cartilage) Ends Cricoid Cartilage Primary Bronchus

Trachea: Held open Lumen lined by

Trachea: Cross section of neck at level of vertebra cervical 6

Lungs: Occupy most of thoracic cavity

Lungs: Primary bronchus, pulmonary artery, and pulmonary veins enter/leave lung together

Lungs: Surrounded

Lungs: Each lung divided into lobes by deep grooves or fissures

Lungs: Each lung divided into lobes by deep grooves or fissures

Lungs: Each lung divided into lobes by deep grooves or fissures

Lungs: Each lung divided into lobes by deep grooves or fissures

Lungs: Each lobe has

Lungs: Each lobe consists of

Trachea Primary bronchi Secondary bronchi Tertiary bronchi (smaller branches) (bronchioles) Terminal bronchioles Respiratory bronchioles Alveolar ducts Alveoli

Alveoli : Wall = Other cells:

As the bronchi branch and divide, At the end,

This air (in the alveolus) and blood (in the capillaries) are separated by a very thin wall, called

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