Briefly describe each group of specialized cells.

tissue
organs
organ systems

answer fast plz!

Tissue:many cells that work together to perform a specific job

organs:    Two or more tissues working together

form an organ

Example: Your heart is an organ that uses all types of tissue (epithelial, muscular, nervous and connective) to pump blood

 organ system:Organs working together

   make up organ systems

There are 9 major organ systems

Explanation:

it is either c or d and i know for sure it is not a or b

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.