Respiration in Plants and Animals ♪♫

Basic Knowledge
Earth is a biosphere that is able to produce and sustain life . The two basic systems are Plants and Animals in Earth's cycle of life , with plants giving out oxygen through photosynthesis and animals taking in oxygen with their lungs and exhaling carbon dioxide as a byproduct. Plants require carbon dioxide to live and flourish with their end-product again becoming oxygen. This balancing process of complementary systems is known as respiration and photosynthesis.
Respiration
As stated on TutorVista.com, "respiration can be broadly defined as the breakdown of organic compounds into simpler compounds accompanied by the release of energy in the form of ATP." This is the process we call, at the most basic level, "breathing." Plants and animals breathe, but animals, including humans, require plants to convert the energy of the sun into oxygen. Animal life receives oxygen molecules, and , after a process called internal respiration and cellular respiration takes place inside the animal or human body , exudes carbon dioxide molecules.

External Respiration
External respiration is the process wherein animal life receives air from the environment and in a gaseous exchange returns the air to the environment in another form. This gaseous exchange takes place in all life forms, from insects to fish to human beings to plants, including algae and fungus.

Internal RespirationInternal respiration is the distribution process in the body of an animal wherein oxygen is carried via the lungs and bloodstream throughout the body and broken down and converted into cellular energy.

Cellular Respiration
Cellular respiration is the conversion process that is initiated in the cytoplasm and finishes in the mitochondria, with the end product being carbon dioxide molecules. The cellular system is like a furnace burning energy, and the byproduct of that combustion is carbon dioxide. After being exuded into the atmosphere, that carbon dioxide becomes an element in the continuing process of photosynthesis .