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The Respiratory System of a Human and a Fish

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Maggie Bai

on 25 May 2014

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Transcript of The Respiratory System of a Human and a Fish

The Respiratory System
Comparison between a human and a fishy

The main parts of the Human Respiratory system
The Respiratory System supplies the blood with oxygen. The main parts of the respiratory system include the lungs, trachea, bronchi, and bronchial tube. Other parts include the ribs, diaphragm, nasal cavity, esophagus, pharynx, nose, alveoli, and the mouth.
Every human has two lungs at birth, or at least they're supposed to. Lungs are the main part of the respiratory system. Red blood cells carry oxygen to body cells, which take the carbon dioxide out of the oxygen, making the oxygen pure. The oxygen is then taken to the lungs. The trachea is called the windpipe. It is located in the lungs and cleans the air once more. The air then makes its way to the Bronchi. Both lungs have a bronchi. The Diaphragm is located just below the lungs. it starts your breathing. Breathing results in the diaphragm flattering up and down.
The Parts (2)
The diaphragm flatters because it needs to make space in the lungs, for air. When breathing out, the diaphragm contracts to squeeze the air out. It is the main muscle in the process of breathing.

Air is inhaled/exhaled through the mouth or nose. In the nostrils, there are small hairs called Cilia. Cilia protect the nasal passage by filtering out dust and other unwanted organisms. In the mouth, the two openings of the airway (nasal cavity and mouth), meet at the throat (pharnyx).
By: Maggie Bai and Sarah Zalewska
Humans & Fishes
have lungs
lungs are placed in the upper body surrounding the heart
breathe in oxygen
can only breathe on the surface

Human Respiratory System
Fish Gills
The Alternative Lung
Fish bladders are known for being a highly vascular (blood-related) organ. Some fresh-water fishes die if not near the surface for a very long time. This is because well-oxygenated air is not the same as fresh oxygen. The bladder also helps store the left over oxygen.
The Human Respiratory system is very unique. Consisting of primarily the lungs, but having many other parts as well. As you could have guessed, this system controls your breathing. Without it, you probably wouldn't be here right now.

The Respiratory System begins when you inhale and exhale. The diaphragm flatters up and down when the host is breathing. Hiccups are an accurate example.
In a way, the Fish Respiratory system is similar to the human respiratory system. However, at the same time it is not.

Fishes breathe through their gills, taking in dissolved oxygen and carbon dioxide. Their lungs(gills) are placed toward the side and to the back of the mouth. They also have an alternative lung, the bladder. However, many deep water fishes lose their bladder completely in their lifetime.
The Parts
Even though the Pharnyx is part of the digestive system, it is also a part of the respiratory system. The pharnyx is made up of 2 passageways. One is for food (esophagus, leads to the stomach) and the other for air.
Fish bladders follow the same progressive (growth) pattern as land vertebrates (mammals, reptiles, etc.). The lungfishes Lepidosiren and Protopterus are primitive (first) systems as they are the originating fish.
have gills
have alternative lung (bladders)
gills are placed toward the side and to the back of the mouth
breathe in dissolved oxygen and carbon dioxide
breathe on the surface and underwater

die without oxygen
breathe in some form of oxygen
same progressive pattern
both are highly vascular organs
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