Question

Groups of cells that work together to do a specific job

Answer 1

group of cells = tissue
group of tissues = organ
many organs = organ system
organ system = body/organism

 Systems

Circulatory System
Digestive System
Endocrine System
Lymphatic System
Muscular System
Nervous System
Reproductive System
Respiratory System
Skeletal System
Urinary System
Integumentary System

Answer 2

Many cells = tissue
Many tissues = organ
Many organs = organ system
Many organ systems = organism