Animalia Flashcards
How are animals different from plants and fungi?
Animals should be MOVABLE at least at one stage of their lives. Animals don’t have cell walls.
What are invertebrates? Example?
Animals that don’t have spine or inner skeleton. Examples are millipide, crab, insects, and corals
What are vertebrates? Example?
Animals that have internal skeleton. Examples are humans, lizards, and fish.
How many body layers do animals typically have? What are they?
They have 3 body layers: endoderm, mesoderm, and ectoderm.
What is an endoderm?
It’s a layer containing organs suh as liver, lungs, and heart.
What is an ectooderm?
It’s a layer containing skin, nervous system, and sense organs.
What is a mesoderm?
It’s a layer containing muscles, blood, kidneys, and reproductive systems.
What organism has 2 body layers?
A sponge.
What are 3 types of symmetry?
Asymmetry, Bilateral and Radial symmetry.
What is a coelom? How are animals what have and don’t have it called?
It’s a body cavity. Animals with it are called coelomates and acoelomates.
In what animals does coelom subdivides?
In vertebrates.
What are some examples of acoelomates?
Jellyfish, corals, and flatworms.
What is segmentation? Examples?
It’s when a multicellular body is made of repetitive segments. Examples of segmented animals are roundworms and centipedes.
What is an anterior body side?
Closer to the head (upper part)
What is an posterior body side?
Closer to the tail (bottom part)
What is an dorsal body side?
Back side (spine side)
What is an ventral body side?
Front side (belly side)
What is Cephalization?
it’s a concentration of nervous system, control, and senses organs in anterior of the body.
Why are sponges and corals are animals if they sessile (don’t move)?
Because when they were moving in their juvenile stage.
What are 2 ways to reproduce sexually?
- Internal fertilization—where egg and sperm meet inside (humans).
- External fertilization—the opposite from internal (amphibians and fish).
