Respiratory system notes

Macrophages are also present which phagocytize bacteria that make it into the alveoli. Inflation reflex — regulates the depth of breathing, prevents overinflation of the lungs 4. This is necessary in order to exert a pulling action on the lungs.

The Respiratory System

Creating the model in this lesson helps the students better understand the role of the diaphragm in the respiratory system and addresses NGSS SP2 - Developing and using models. When we breathe, we inhale oxygen and exhale carbon dioxide.

See the following for highly magnified views of alveoli and associated cells and tissues: The pleural cavity is the potential space between the two pleura visceral and parietal of the lungs. Once it has gone past the mouth or nose, it goes down the pharynx in the throat till it gets to the larynx, or windpipe.

The space between the visceral and parietal pleura is called the pleural cavity. I go through the instructions with the students, pointing out that the directions for creating their model will be found in their textbook.

We could not make the changes because we did not have the larger balloons. Pleural cavity contains serous fluid to lubricate surfaces during breathing.

Chapter 16 – The Respiratory System

It has cartilages shaped like Cs or Us with the open portion posterior. Before you make a model, describe how the respiratory system works.

This happens because CO2 levels become permanently elevated and the CO2 receptors cease responding. The DRG sends stimuli to the muscles of inspiration: Purely obstructive disorders do not technically reduce the volume which can be ventilated but they reduce the rate of ventilation by increasing the resistance to airflow.

Vocal cord tension is controlled by arytenoid and other muscles [See laryngeal muscles ] which contract or relax to increase for high pitches or decrease for low pitches tightness.

This can happen if a person is stabbed or a broken rib pierces the lung. The stretch receptors allow a reflex which prevents overinflation called the Hering-Breuer Reflex, much as a skeletal muscle reflexively changes from one action to another.

Human Respiratory System

In addition to the Type I alveolar cells the simple squamous cells of the alveolar wall there are Type II alveolar cells present which secrete surfactant.

The variation is related to the forcefulness and depth of inspiration. Then the carbon dioxide goes back up the respiratory system to leave the body.

The submucosa of the trachea contains seromucous glands to produce an abundance of mucus for the mucociliary escalator, the mechanism by which the mucus is moved up and out of the respiratory tract. When this blood reaches the systemic tissues the reverse process occurs restoring levels seen in deoxygenated blood.

If the group is not correct, I send them back to try again. The following table summarizes the responses to various stimuli on the respiratory system: The pneumotaxic center increases the rate by shortening inspirations.

The primary function of the respiratory system is to supply the blood with oxygen in order for the blood to deliver oxygen to all parts of the body.

Abdominal wall muscles internal and external obliques, rectus abdominus and transverses abdominus can help squeeze out more air. While using the demonstration model, I ask the students to describe what the parts of the model represent and to describe the process being modeled.Respiratory System Notes 1.

Essentials of Human Anatomy & PhysiologyThe Respiratory System Anatomy & Physiology II Mr. Hildebrandt 2.

Summary Notes All About The Respiratory System Including: Functions, Zones, Volumes And Capacities, O2 & Co2 Transport, Breathing Mechanics. Notes over the respiratory system with powerpoint presentation and images for labeling. Document is intended for students of anatomy. The Respiratory system is a tube opening to the outside world on one end, and along the way it divides and ends up in tiny, grape-like sacs, which interface with the blood.

The. The Respiratory System: Respiration involves several components: Ventilation - the exchange of respiratory gases (O 2 and CO 2) between the atmosphere and the lungs.

This involves gas pressures and muscle contractions. External respiration - the exchange of gases between the lungs and the blood. The respiratory system does this through breathing. When we breathe, we inhale oxygen and exhale carbon dioxide. This exchange of gases is the respiratory system's .

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Respiratory system notes
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