Table of Contents
How do animals without gills or lungs get oxygen?
Some animals take in oxygen only through the passive movement of air, called diffusion.
Do all organisms have lungs or gills?
Respiratory System – All About Breathing Fish have gills while mammals, birds, and reptiles have lungs. Your respiratory system is made of your nose and mouth, a tube called the pharynx, another tube called the trachea, and your lungs.
Do organisms have to breathe oxygen?
Most living things need oxygen to survive. Oxygen helps organisms grow, reproduce, and turn food into energy. Although other animals may use different organs to breathe with, they all get oxygen into their bodies through respiration.
Why do animals need to breathe in oxygen?
Animals need oxygen from air to carry out the reactions that release and transform energy from food. Carbon dioxide is released as a waste product during these processes. In mammals, including humans, air enters the body through the nose and mouth, and moves into the lungs.
Why do animals need to eat and breathe o2?
During cellular respiration animal cells combine oxygen with food molecules to release energy to live and function. Remember that cellular respiration produces carbon dioxide as a waste product. Animals use energy to grow, reproduce, and to function.
Why is breathing necessary for animals?
Breathing is important to organisms because cells require oxygen to move, reproduce and function. Breath also expels carbon dioxide, which is a by-product of cellular processes within the bodies of animals. If carbon dioxide built up in a body, death would result. This condition is called carbon dioxide poisoning.
Why do single-celled organisms does not require any complex or specific organs?
A single-celled organisms does not need specific organs for taking in food, exchange of gases or removal of wastes because the entire surface of the organism is in contact with the environment. Thus tha exchange of gases can take place by simple diffusion and there is no need of special organs.
Why might a unicellular organism need oxygen?
All organisms that perform aerobic respiration, the process where glucose and other food molecules are broken down for energy, require a regular supply of oxygen. So without oxygen, organisms would not be able to obtain enough energy to power their body processes.