Simple Invertebrates Flashcards
Which is an invertebrate? A. Grasshopper B. Cow C. Man D. Whale
A. Grasshopper
Some invertebrates eat food through their mouths. Others absorb food through their what?
Tissue
Invertebrates have three basic body plans, or types of what?
Symmetry
What are the three basic body plans for invertebrates?
Bilateral Symmetry (2 halves)
Radial Symmetry (Spokes from center)
Asymmetrical (none)
List 2 functions of neurons
Sense environment
Carry messages around body to control an animals actions
Ganglion
A concentrated mass of nerve cells
Gut
A pouch where food is digested
Coelem
The body cavity that surrounds the gut
Are sponges simple or complicated?
Simple
Why are sponges considered animals not plants?
They can’t make their own food (heterotrophs)
Describe the special way sponges bring oxygen and food into their bodies
A sponge sweeps water into its body through pores
If a part of the sponge breaks off the sponge can what?
Regenerate
Do sponges reproduce sexually or asexually?
Both
What traits do all cnidarians have in common?
Can regenerate
What are the 2 body forms of cnidarians?
Medusa and Polyp
What is the difference between a medusa and a polyp?
Medusa - swim freely
Polyp - attach to surface
Polyp or Medusa
Jellyfish
Medusa
Polyp or Medusa
Hydrozoan
Polyp
Polyp or Medusa
Sea Anemone
Polyp
What polyps build massive underwater reefs?
Corals
What distinguishes flatworms from other worms?
They are the simplest worms
All flatworms have what?
Bilateral symmetry
What are the bumps on the side of a a flatworms head?
Sensory lobes
What is a roundworm’s body shaped like?
Piece of spaghetti
How can round worms be helpful?
Break down dead tissues of plants which make soil
What worms do you see after a rainfall?
Earthworms
Use tentacles to grab food
A. Snails and Slugs
B. Octopuses and Squids
C. Clams and Oysters
B
Use grills to filter food
A. Snails and Slugs
B. Octopuses and Squids
C. Clams and Oysters
C
Use a radula to scrape food
A. Snails and Slugs
B. Octopuses and Squids
C. Clams and Oysters
A
Mollusk have a complex (blank) to control breathing, movement, and digestion
Ganglia
Octopuses and squids have the most advanced (blank) of all invertebrates
Nervous system
Describe an open circulatory system
Fluid isn’t completely contained in the vessels
Describe a closed circulatory system
A heart circulates blood through a network of vessels that form a closed loop
Mantle
A layer of tissue that covers the visceral mass
Shell
Protects some mollusks from predators
Foot
Helps the animal move
Visceral mass
Gills, guts, and other organs
Annelid worms are often called what?
Segmented worms
What are 2 ways that annelid worms are more complex than the other worms?
Closed circulatory system
Complex nervous system
How do earth worms help gardeners?
They eat dead plant and animal matter
They eat material in the soil
