Lesson 4 - Main Functions of the Organ - The Heart

 Students should be able to identify and label the major parts of the heart 

The learners are able to describe the major parts of the heart

The heart is a hollow, muscular organ located in the chest cavity between the lungs. Its main function is to pump blood through the blood vessels by repeated, rhythmic contractions. The blood needs to circulate in order to put oxygen into the blood and take the carbon dioxide out from the body.

Human Heart | Human heart structure and function | Parts of the human heart | Video for kids - YouTube 

Left Atrium 

• Description: The left atrium is like a waiting room for fresh blood.

• Analogy: Imagine it as a small lobby where fresh blood waits to start its journey.

Left Ventricle 

• Description: The left ventricle is a strong pumping room.

• Analogy: Think of it as a powerful pump that sends the fresh blood to the entire body, like a superhero pumping room.

Right Atrium 

• Description: The right atrium is another waiting room for used blood.

• Analogy: Picture it as a room where tired blood comes back to rest before going on its next adventure.

Right Ventricle 

• Description: The right ventricle is a pumping room for used blood.

• Analogy: This room pumps the used blood to the lungs for a breath of fresh air, just like a superhero room preparing for its next mission.

Connecting the Circulation 

• Description: Explain that the left side of the heart deals with fresh blood going to the body, while the right side handles used blood going to the lungs.

• Analogy: It's like a circle – the heart continuously sends blood on a journey, and it always comes back for a refill.

Aorta 

Description: Aorta is like the main highway that carries the pumped blood away from the heart to reach every part of the body. 

Analogy: Imagine the heart is a pumping station, and the aorta is the highway. The blood is like cars that travel on this highway to deliver important supplies (oxygen and nutrients) to different neighborhoods (body parts). 

ACTIVITY:

Create a basic model of the heart using different colors for the aorta, ventricles, and blood vessels. 

MAPEH - Illustration of the heart

The learners are able to give importance on the function of their hearts.

Problem:

What is your heart rate?

What You Need:

stopwatch, paper, and pencil

What To Do:

1. Take your own pulse. Count the number of beats in 30 seconds and

double it to get the number of beats per minute. Record the results.

2. Jog in place for 5 minutes. After that, record the pulse using the same method.

3. Finally, rest for a few minutes and get your pulse again and record the

results.

What Have You Found Out?

1. How would you compare the pulse rate before and after jogging?

2. How long did it take to return to its normal pulse rate?

Conclusion:

What is your heart rate now?