Anatomy/Function of Arthropoda
What is molting?
Shedding of the exoskeleton so the arthropod can grow
How many legs do insects have?
6
Name two examples of crustaceans.
Crab, Shrimp, Lobster
What animal has a spinneret that is a specialized body part?
Spiders
What unique body feature defines annelids?
Segmented bodies
What is metamorphosis?
A process where an organism changes form as it grows
How many body regions do insects have?
3 (head, thorax, abdomen)
Which arthropod group is mostly aquatic?
Crusteceans
What do crustaceans use for breathing?
gills
What type of body symmetry do annelids have?
bilateral symmetry in each segment
Main characteristics of all arthropods. (3)
Exoskeleton, segmented bodies, jointed appendages
How many legs do arachnids have?
8
How do centipedes and millipedes differ?
Centipedes have one pair of legs per segment (carnivores); millipedes have two pairs per segment (herbivores)
What is the function of pedipalps in arachnids?
sensing and feeding
What does the word “Annelida” mean?
Little rings
What is the term for the concentration of sense organs and nerve cells at the front of the body?
Cephilization
How many body segments do arachnids have? What is combined, and what is it called?
2, Cephalothorax, Head and thorax
Which one millipedes or centipedes can be venomous?
Centipede.
What is an example of an insect that undergoes complete metamorphosis?
Butterfly (egg → larva → pupa → adult)
How are earthworms beneficial to soil?
They aerate the soil and add nutrients by breaking down organic matter