Module 12 (vocabulary is on Biology ipad app) Flashcards
Name the five common characteristics among the arthropods.
Exoskeleton, body segmentation, jointed appendages, open circulatory system, and a ventral nervous system are the common features of arthropods.
See diagram on page 391 in text book, question #4
a. eye
b. brain ganglia
c. stomach
d. gonad
e. heart
f. pericardial sinus
g. intestine
h. anus
i. nerve cord
j. digestive glands
k. sternal sinus
l. mouth
m. esophagus
n. green gland
Explain the flow of blood in a crayfish, starting from the pericardial sinus.
look in answer key on page 38, #5
What purpose does the green gland serve?
It cleans the blood of impurities.
What structures (besides the gills and gill chamber) are vitally important for respiration in a crayfish?
The swimmerets and maxillae are important.
What happens when a crayfish loses a limb.
The injury gets sealed off to prevent bleeding, and then a new limb regenerates.
Where do the fertilized eggs of a crayfish go?
They are attached to the swimmerets.
Why do arthropods molt?
They molt because their exoskeletons get too small for their growing bodies.
What two appendages are responsible for taste and touch in a crayfish?
The antennules and antennae are are responsible for taste and touch.
What five characteristics set arachnids apart form the other arthropods?
Four pairs of walking legs, two segments in body, no antennae, book lungs, four pairs of simple eyes.
What are the three basic types of webs that siders spin?
sheet web; tangle webs; orb webs
Do all spiders use their silk to spin webs?
no
Why are the spider’s lungs called book lungs?
The lung has many thin layers that look like the pages of a book.
What four characteristics set insects apart from the other arthropods?
Three pairs of walking (or jumping) legs, wings, three segments in body, one pair of antannae.
Why don’t insects have respiratory systems?
Insects do not need respiratory systems because of a complex network of tracheas that allow air to travel throughout the body.
