Arthropods Flashcards
Exoskeleton
A body covering, made of chitin and provides support and protection. Limits growth potential.
Molt
Shed an outer covering to be replaced with a new one.
Thorax
The body region between the head and the abdomen.
Abdomen
The body region that comes after the thorax.
Cephalothorax
The body region composed of the head and thorax fused together.
Compound eye
An eye made of many lenses with a very limited scope.
Simple eye
An eye with only one lens.
Open circulatory system
A system that allows the blood to flow out of the blood vessels and into varies cavities so that the cells are in direct contact with the blood.
Name the five common characteristics among arthropods?
Exoskeleton, Body segmentation, Jointed appendages, Ventral nervous system, An open circulatory system.
Statocyst
The organ of balance in a crustacean.
Gonad
General term for the organ that produces gametes.
what five characteristics set arachnids apart from the other arthropods?
Have 2 more legs, cephalothorax, four pairs of simple eyes, no antenna, breath through book lungs.
What are the three basic types of webs a spider spins?
Sheet web, tangle web, and orb web.
Do all spiders use their silk to spin webs?
no
Why are the spiders lungs called book lungs?
There lungs are made up of several thin layers that extract o2 from the air.
What four characteristics set insects apart from the other arthropods.
3 pairs or walking or jumping legs, usually have wings at some stage of life, one pair of antenna, and three segments.
What four types of wings exist among insects.
Membranous(flies), scaled wings(butterflies), leather like wings (Grasshoppers), and horny wings (Ladybugs).
Complete metamorphosis
4 stages. Egg, larva, pupa, adult.
Incomplete metamorphosis
3 stages. Egg, nymph, adult.
What purpose does the green gland serve?
It cleans the blood of impurity’s.
What structures beside the gills and the gill chambers, a are vitally important for respiration in a crayfish?
The swimmerets, and the maxillae.
What happens when a crayfish looses a limb?
It seals of the limb to stop bleeding then it regenerates the limb.
Where do the fertilized eggs of a crayfish go?
They are attached to the swimmerets.
Why do arthropods molt?
Their exoskeleton gets to small for their growing body.
What two appendages are responsible for taste and touch in a crayfish?
Antenna and Antennules.
Why don’t insects have respiratory systems?
They have a complex network of tracheas that allow air to travel thorough out the body.
If an insect goes through a pupa stage does it complete incomplete or complete metamorphosis?
Complete.
Explain the blood flow in crayfish, starting with the pericardial sinus.
- Blood collects in the pericardial sinus.
- Blood enters the heart through one of three openings in the hearts surface.
- Each opening has a valve that closes when the heart is ready to pump.
- absorbs the blood and closes the valve.
- heart pumps blood through a series of blood vessels.
- vessels dump blood into the varies body cavities.
Insects with two leather-like wings and two membranous wings.
Coleptera
Social insects with membranous wings.
Diptera
Insects with two membranous wings and two membranous balancers.
Lepidoptera
Insects with two horny wings and two membranous wings.
orthoptera
Insects with scaled wings
Hymenoptera
