Respuesta :
Answer:
Cells
Explanation: All living things are made of cells with specific jobs and duties to perform to keep the organism living, such as muscle cells that combine and create muscle tissue, which combines to make the muscular system
Answer:
Cells
Explanation: All living things are made of cells with specific jobs and duties to perform to keep the organism living, such as muscle cells that combine and create muscle tissue, which combines to make the muscular system