There are not 2 main organs in a human body. I can think of about 7 organs without witch you would not survive for long. But since you put question that way, I guess the most natural response would be brain and heart (although without lungs your brain would not have must use). The function of the heart is to circulate the blood around your body, to supply oxygen and many more chemicals to all your organs and tissues. The function of the brain is to coordinate your nervous system.
describe the structure of the main Tissues of the body and their role in the Functioning of two named body organs
Heart and lung. Heart for circulating the blood and lung for adding oxygen to the blood.
An organ is a structure that is composed of 2 or more different kinds of tissues.
cells, tissues, organs, organ systems, and organisms
Atoms, molecules, organelles, cells, tissues, organs, organ systems, organism. Each structure contains the structure before it. An organism is made up of organ systems, an organ system is made up of organs, organs are made up of tissues, cells are made up of organelles, organelles are made up of molecules, and molecules are made up of atoms.
An organ is (organs are) made up of different kinds of tissues arranged together to perform a specific function.
Histology
Two or more tissues are organs and the organ system is a functioning of organs working together.
Proteins are required for the structure, function, and regulation of the body's cells, tissues, and organs.
In your body, cells make specialized tissues; specialized tissues make specialized organs; organs control major functioning within the body.
"organs"
An organ is a structure that is composed of 2 or more different kinds of tissues.
cells, tissues, organs, organ systems, and organisms
Atoms, molecules, organelles, cells, tissues, organs, organ systems, organism. Each structure contains the structure before it. An organism is made up of organ systems, an organ system is made up of organs, organs are made up of tissues, cells are made up of organelles, organelles are made up of molecules, and molecules are made up of atoms.
organs
organs
An organ is (organs are) made up of different kinds of tissues arranged together to perform a specific function.
Organs are made up of many tissues. Tissues are a building block of organs. For example: Tissues are to organs as bricks are to houses.
Histology