Animal Classification
The defining characteristic of birds
What are feathers?
A carnivore that doesn't do its own hunting
What is a scavenger?
The output of the respiratory system
What is carbon dioxide?
Breaking down food into smaller pieces with our teeth
What is mechanical digestion?
This is the mammal group that kangaroos belong to
What are marsupials?
The symmetry that can be show by cutting an object in half
What is bilateral symmetry?
The body system that functions as the "wiring" of an animal
What is the nervous system?
Without this system, our muscles would have nothing to attach to
What is the skeletal system?
The types of nutrients our body cannot make
What are vitamins?
The type of muscle that moves your eyelids
What is a dual-control muscle?
A digestive system with only a single opening
What is an incomplete gut?
The tube that carries blood away from the heart
What is an artery?
The organ system that includes hair, nails, and skin
What is the integumentary system?
The structures in the kidneys that filter blood
What are nephrons?
The bone your biceps and triceps are attached to
What is the humerus?
The organization of sensory organs at one head of an organism's body
What is cephalization?
A web of neurons that is not a brain
What is a nerve net?
This is what mature bones are primarily made of
What is compact bone?
A tube made up of several digestive organs
What is the alimentary canal? (or digestive tract)
The second layer of skin
What is the dermis?
The two defining characteristics of mammals
What are hair and milk?
The mechanism that allows certain animals to breathe through their skin
What are spiracles?
The dark and light bands of muscles
What are striations?
The six nutrient types
What are carbs, fats, minerals, vitamins, proteins, and water?
This structure relies on fluid pressure to support an animal
What is a hydrostatic skeleton?