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K-12 Grade 9 Science


Unit 1:
Module 1: The Human Breathing System


Breathe in and out. Notice that your chest and belly are moving and feel the air passing from the nose. The respiratory system is responsible for supplying oxygen for our body to keep it moving.



03/07/17

Activity 1: That’s A Lot Of Grapes
·         Part A
o   Observe a grape cluster closely, and then compare it to the bronchioles and alveoli of the lungs.
o   Both appearances look the same, each “grape” is similar to the alveoli.
o   The bronchioles were located at the end of the trachea. This is the part where gas exchange takes place, and is the unit of respiration.
·         Part B
o   Label each part of the respiratory system. Give its
functions.


-   The Bronchi is where gas exchange takes place. Each alveoli resembles a grape, which allows the lungs to easily absorb oxygen and expel carbon dioxide.

-   The respiratory pathway is a series of tubes, with each path having its own purpose and function

-   Whenever an organ system fails to carry it out its function properly, the whole body would shut down and results to sickness or death.



















Activity 2: Bottled Balloons
                 Describe the movement of the diaphragm helps the lungs

-   When you breathe in or inhale, the diaphragm contracts. Inhaling moves the diaphragm down and expands the chest cavity. At the same time, the rib cage would also move up and down to provide more space for the lungs. Air pushes in when there is a higher pressure, and pushes out when there is a lower pressure.
-   When you breathe out or exhale, the diaphragm relaxes. The lungs and the ribcage would go back to their original size and place, preparing to inhale again.






Activity 3: Just Go with the Flow
Air first enters your lungs and then into the left part of your heart. It is then driven by your heart into the bloodstream, all the way through your body. The heart pumps blood, which transports essential nutrients, oxygen, and other chemicals to every cell in your body. Onc it reaches the cells, oxygen processes the nutrients to release energy. Carbon dioxide it given off during this process. The blood delivers carbon dioxide into the right portion of your heart, from which it is pumped to the lungs. Carbon dioxide leaves your body through the lungs when you exhale.



















The Circulatory System
The circulatory system is the life support structure that nourishes your cells with nutrients from the food you eat and oxygen from the air you breathe. It can be compared to a complex arrangement of highways, avenues and lanes connecting all the cells together into a neighborhood. Sequentially, the community of cells sustains the body to stay alive. Another name for the circulatory system is the cardiovascular system. The circulatory system functions with other body systems to deliver different materials in the body. It circulates vital elements such as oxygen and nutrients. At the same time, it also transports wastes away from the body.






03/21/17

Activity 4: Let’s Organize

Explain the different types of circulation







































Activity 5: Pump It

The heart is a hallow muscular organ, about the size of your fist, which is located in the center of your chest with a slight degree facing to the left. Every side is divided into two chambers, the atrium and the ventricle, each of which has left and right portion, totaling to four chambers altogether. The top chamber is the atrium (plural: atria). The bottom chamber is called the ventricle. The valve acts as a one-way door, allowing blood to flow either forward into the next chamber, or out of the heart.




Activity 6: The Rhythm
Each time your heart beats, it delivers oxygen-rich blood to your body, which allows it to function properly. Your heart rate or pulse is the number of times your heart beats in a minute (BPM or beats per minute). Shorter time intervals may be used in taking the pulse as long as it comes to 60 seconds upon multiplying with a factor. When you are resting, your heart rate slows down, as your body does not need as much blood as it does when you exercise.



Activity 7: Cigarette Smoking is Dangerous to your Health

Cigarette smoking harms nearly every organ in the body, causing many illnesses and affecting health in general. The negative effects of smoking on circulatory system include increased heart rate and blood pressure, coronary heart disease, arteriosclerosis, and vascular diseases. The respiratory diseases caused by smoking are chronic bronchitis, emphysema, asthma, cough, colds, tuberculosis, lung cancer, and other respiratory infections.



Activity 8: Prevention is better than Cure

The leading causes of death around the world are diseases affecting the respiratory and circulatory systems. However, they can be prevented simply by having a lifestyle that promotes wellness. Circulatory and respiratory diseases begin to develop with unhealthy living. Symptoms of these illnesses must not be neglected and appropriate cure must be given immediately.

The best way to prevent diseases in the respiratory and circulatory systems is to have a healthy lifestyle, which includes balanced diet, regular exercise, adequate rest, proper hygiene, and avoiding vices such as cigarette smoking and alcohol drinking. Circulatory and respiratory disease can easily be detected with regular health check-up and physical screening.



Activity 9:

 The best way to prevent diseases in the respiratory and circulatory systems is to have a healthy lifestyle, which includes balanced diet, regular exercise, adequate rest, proper hygiene, and avoiding vices such as cigarette smoking and alcohol drinking. Circulatory and respiratory disease can easily be detected with regular health check-up and physical screening.


Several lifestyle choices can affect a person’s risk for developing respiratory and circulatory diseases. Negative lifestyle weakens your system while healthy lifestyle leads to complete wellness. Vices, stressful environments, and unhealthy eating habits can cause various diseases, specifically of the respiratory and circulatory systems.

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