Module #12: Phylum Arthropoda Flashcards
Molt
To shed an old outer covering so that it can be replaced with a new one
Thorax
The body region between the head and the abdomen
Abdomen
The body region posterior to the thorax
Cephalothorax
A body region composed of the head and thorax fused together
Compound eye
An eye made of many lenses, each with a very limited scope
Simple eye
An eye with only one lens
Open circulatory system
A circulatory system that allows the blood to flow out of the blood vessels and into various body cavities so that the cells are in direct contact with the blood
Exoskeleton
A body covering, typically made of chitin, that provides support and protection
Statocyst
The organ of balance in a crustacean
Gonad
A general term for the organ that produces gametes
Compleat metamorphosis
Insect development consisting of four stages: egg, larva, pupa and adult
Incomplete metamorphosis
Insect development consisting of three stages: egg, nymph, and adult
The five common characteristics of Arthropoda
An exoskeleton, body segments, jointed appendages, a ventral nervous system, an open circulatory system.
What five characteristics set arachnids apart from other Arthropods?
Four pairs of walking legs, a cephalothorax instead of separate head and thorax, usually have four pairs of simple eyes, no antennae, respiration done through organs known as “book lungs”
What are the three basic types of webs that spiders spin?
Sheet webs, tangle webs, and orb webs
