Constructs a model to demonstrate the mechanism of breathing

Science V

ReviewIdentify the parts of the

Respiratory System

It is lined with fine hairs called cilia which filter air

before it reaches the lungs. It keeps the windpipe open.

ReviewIdentify the parts of the

Respiratory System

TRACHEAIt is lined with fine hairs

called cilia which filter air before it reaches the lungs. It

keeps the windpipe open.

ReviewIdentify the parts of the

Respiratory System

It warms, moistens, and filters air as it is inhaled.

ReviewIdentify the parts of the

Respiratory System

NASAL CAVITYIt warms, moistens, and filters air as it is inhaled.

ReviewIdentify the parts of the

Respiratory System

The functional respiratory units in the lung where gases

are exchanged.

ReviewIdentify the parts of the

Respiratory System

ALVEOLIThe functional respiratory

units in the lung where gases are exchanged.

ReviewIdentify the parts of the

Respiratory System

Passage way for air that leads to trachea.

ReviewIdentify the parts of the

Respiratory System

PHARYNXPassage way for air that

leads to trachea.

ReviewIdentify the parts of the

Respiratory System

A large sheet of skeletal muscle below the ribs. It controls the process of

breathing and moves up and down during the breathing

process.

ReviewIdentify the parts of the

Respiratory System

DIAPHRAGMA large sheet of skeletal muscle below the ribs. It controls the process of

breathing and moves up and down during the breathing

process.

ReviewIdentify the parts of the

Respiratory System

Two branches at the end of the trachea, each lead to a

lung.

ReviewIdentify the parts of the

Respiratory System

BRONCHITwo branches at the end of the trachea, each lead to a

lung.

ReviewIdentify the parts of the

Respiratory System

The voice box where the vocal chords are located.

ReviewIdentify the parts of the

Respiratory System

LARYNXThe voice box where the vocal chords are located.

ReviewIdentify the parts of the

Respiratory System

A network of smaller branches leading from the bronchi into the lung tissue

and ultimately to the air sacs.

ReviewIdentify the parts of the

Respiratory System

BRONCHIOLESA network of smaller

branches leading from the bronchi into the lung tissue

and ultimately to the air sacs.

ReviewIdentify the parts of the

Respiratory System

It controls opening to the larynx.

ReviewIdentify the parts of the

Respiratory System

EPIGLOTTISIt controls opening to the

larynx.

Checking of Assignment

Did you bring the following?• an empty stick-o or 1.5 soft drink bottle• a Y-shaped glass tube• rubber bands and clay • two small and one big balloons• pair of scissors

MotivationClose your lips tightly and pinch your nose so that no air can enter the lungs. Then breathe in and out. Next, feel the lower part of your ribs. Can you feel diaphragm going up and down?You will find out how air is forced in and out of your lungs.

Presentation

Watch the video clip:MECHANISM OF BREATHING

Part 01by 7activestudio

Motivation

Perform ActivityMechanics of Breathingas shown in the diagram

Presentation

Problem: What happens to the lungs as we breathe?What You Need:• rubber bands and clay • two small and one big balloons• pair of scissorsan empty stick-o or 1.5 soft

drink bottle• a Y-shaped glass tube

Diagram

What To Do:

1. Assemble the materials as shown in the diagram.2. Pull the rubber sheet downward. Observe what happens to the balloons inside.3. Observe what happens when the rubber sheet is released.

What have you found out?

1. What part of the model represent the chest cavity?2. What part of the model represents the lungs? How about the diaphragm?3. What happened when the rubber sheet was pulled downward?4. What happened when the rubber sheet was released?

Conclusion:

Through your chest-lung model, demonstrate the mechanics of breathing.

Concept Formation

Answer the questions in the activity.1. What part of the model represent the chest cavity?2. What part of the model represents the lungs? How about the diaphragm?3. What happened when the rubber sheet was pulled downward?4. What happened when the rubber sheet was released?

Evaluation

Explain the mechanism of breathingusing

the chest-lung model

Assignment

Will the size of the chest cavity affects the volume of the air drawn?

Bring the following by group:white cartolina

pencil and erasermarker (pentel pen)

water color or crayons