Levels of Organization
These are the five major grades of animal organization.
What are Protoplasmic, Cellular, Cell-Tissue, Tissue-Organ, and Organ-System?
These are groups of organs that work together for a common function.
What are organ systems?
This system removes waste from the body to maintain homeostasis.
What is the Excretory system?
This grade is found in unicellular organisms.
What is the Protoplasmic grade?
This system protects the body and includes hair, skin, and nails.
What is the Integumentary system?
This system produces and releases hormones that regulate growth and metabolism.
What is the Endocrine system?
This grade represents the highest level of animal organization.
What is the Organ-System grade?
This system is responsible for breaking down food and absorbing nutrients.
What is the Digestive system?
This system protects the body from infections and harmful substances.
What is the Immune system?
At this grade, similar cells form tissues with common functions.
What is the Cell-Tissue grade?
This system transports oxygen and nutrients throughout the body.
What is the Circulatory system?
This system produces egg and sperm cells.
What is the Reproductive system?
At this grade, groups of cells have different functions like nutrition and reproduction.
What is the Cellular grade?
There are this many total organ systems in animals.
What is eleven?
These two systems work together to enable body movement.
What are the Skeletal and Muscular systems?