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Respiratory system and circulatory system (How do animals exchange gas?…
Respiratory system and circulatory system
Circulatory System
Heart
Pumps blood to all parts of the body
Blood vessels
Carry blood from our heart to all parts of our body
Carry blood from other parts of our body back to the heart
Blood
Transports digested food, oxygen, water, carbon dioxide and other waste materials to the different parts of the body
Respiratory system
Nose
Allows air to enter and leave the body
Contains hair and mucus to trap the dirt in the air
Air that passes through is also warmed and moistened
Windpipe
transfers the air from the nose to the lungs
Lungs
Contains air sacs
Allows exhange of gases in the air sacs
Picks up oxygen from inhaled air
Passes carbon doixide into exhaled air
Oxygen is taken in through the nose and enters the lungs through the windpipe
Gaseous exchange occur
Carbon dioxide in the lungs is transported out of the body through the nose
How do animals exchange gas?
Insects/Arachnids
Openings that lead to tubes (breathing tubes) which carry oxygen to their internal organs
Fish
Take in oxygen through their gills
Water containing dissolved oxygen enter the mouth of the fish. It washes over the gills and the oxygen enters the blood in the gills
As water flows out from under the gill covers,carbon dioxide from the blood is carried away
Birds
Have lungs and they take in air through their nostrils
Mammals
Have lungs and they take in air through their nostrils
Some mammals such as whales and dolphins also have lungs but they breathe through blowholes on top of their head
Amphibians
Lungs and skin
Some amphibians such as the salamander take in oxygen through their gills
Frogs can breathe through their moist skin. When they are underwater they use their moist skin to breathe instead of their lungs