Aspecialized part of a cell which performs a definite function is?

answer:

if a cell is called the basic unit of life, then a group of cells together make up the tissues. these groups of cells have a common origin with a similar structure. and the groups of cells perform a definite function. so, in simple terms, tissues can be defined as a group of cells performing similar functions.

explanation:

answer: i am pretty sure the answer is " cell organelle ".

explanation: i've taken very long lessons on this, and am pretty sure this is the correct function.

cell organelles, cells, tissues, organs, and organ system.

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when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.