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Journey of an Oxygen Molecule
18
Journey of an Oxygen Molecule
Through the respiratory
&
circulatory sytem
by Ann Gao 7th period
Breathed in
Nostril
- Cilia-tiny hairs in nose; stop dust from entering
- two external openings in the of nasal cavity
- the oxygen molecule is breathed in through the nostril
Nostril
Nasal Cavity
- large air filled space above/behind nose in-middle of face.
- oxygen molecule is warmed, filtered, moistened in nasal cavity
Enters Lungs (through trachea)
Trachea
Definition
-a large membranous tube reinforced by rings of cartilage; windpipe
Definition
Function
-connects the larynx (voice box) to the bronchi of the lungs.
Bronchi
extensions of the windpipe that shuttle air to and from the lungs
Bronchi
Lungs
Function
What happens to the oxygen: goes to the blood vessels deep in our lungs and then on to all parts of our body.
Function
Bronchioles
After oxygen enters bronchi, it gets divided and moves in to smaller tubes called bronchioles.
Bronchioles
Alveoli
Air from the bronchioles enters alveoli (tiny air sacs), then it enters capillaries
Alveoli
Into Bloodstream
- Oxygen diffuses into bloodstream through cappillary beds
- goes through the body
- blood carries oxygen to our cells
The Heart
-propels blood through out the body
The Heart
Enters Cells
- oxygen goes through the body in bloodstream and brought to cells
- goes to mitochondria (cellular respiration)
Cellular Respiration
- takes place in mitochondria
- purpose: make ATP
- glucose (sugar) and oxygen are combined to make ATP and carbon dioxide
ATP
- universal energy molecule
- Adenosine triphosphate
- after used by body becomes ADP (adenosine diphosphate)
Glucose
- most common of carbohydrates
- essential nutrient in the human body
- from foods we eat
Glucose
Leaving the Body
- the oxygen is changed to carbon dioxide
- carbon dioxide then travels with your blood back to your lungs and is diffused to the alveoli
- is exhaled
References
- https://prezi.com/9uqpc_zz4x1l/oxy-the-oxygen-molecules-journey-through-the-respiratory-system/
- http://kidshealth.org/en/teens/heart.html
- https://prezi.com/dtd54zgnw9nk/respiratory-and-circulatory-systems-working-together/
- https://www.livestrong.com/article/229319-interesting-glucose-facts/
- wikipedia.org