Maintaining internal conditions within in an organism is a characteristic of life known as

homeostasis.

Explanation:

All living organism on this planet have the ability to change or regulate the environmental conditions with in their bodies that keeps them and their body in a stable positions irrespective of the changing  external environment. This mechanism of regulation is known as homeostasis.

For example - we start shivering , when our body faces a temperature lower than the normal room temperature to maintain constant internal temperature for proper functioning of internal organs and systems.

cellular respiration oxidizes food into energy in the form of atps.

glycolysis (6 c hexose) > 2x atps are used > 6c hexose biphosphate > 2 x 3c triphosphate >

2 x 3c pyruvate (2x nadh produced from nad) and (4x atp produced)

pyruvate actively pumped mitochondrial matrix.

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.