I’m not sure but I’m guessing the answer would be the first one !
In multi-celullar organisms , the cell cycle produces groups of cells that perform the same function. These groups of cells form what it is called a tissue. A tissue is made up of cells that all are specialised to perform the same function. A bunch of tissues form an organ. Organs are more complex in structure and functions.
lots of different organs together form an organ system.
Answer:
B
Explanation:
i am sorry if this is wrong
It is the rib cage (thoracic cage)
