Exam 1: intro to arthropods Flashcards
subphylum chelicerata includes what class
class arachnida (ticks and mites)
subphylum atelocerata includes what classes
class insecta and class myriapoda—no vet importance
what is the largest phylum in the animal kingdom
phylum arthropoda
phylum arthropoda characteristics
externally segmented, has exoskeletons that are periodically shed
open circulatory system
majority undergo metamorphosis
can be beneficial and non-beneficial
terrestrial habitat
entire life cycle on land
aquatic habitat
entire life cycle in water
teresterial and aquatic habitat
immature in water, and adult on land
what is metamorphosis
a change in the form and often habits of an animal during normal development after the embryonic stage
holometabolous
(complete) habitats and food source is different for young and adults
holometabolous immature develop from simple ____ to mostly ____ adults
wingless to winged
what are the developmental stages of holometabolous in order
egg, larva, pupa, and adult
hemimetabolous
(incomplete) immature stage resembles miniature adults; young and adult share habitats and resources
what are the developmental stages of hemimetabolous in order
egg, larva, nymph, and adult
what is at the center of the veterinary and medical importance of arthropods
ability to find the food source
to locate the host, arthropods activate, locate, and orient _____
NEUROSENSORY SYSTEMS
HOW IS UNDERSTANDING HOW A PARTICULAR ARTHROPOD LOCATES BENEFICIAL?
CAN LEAD TO DEVELOPMENT OF PREVENTIVE STRATEGIES
How do arthropods accomplish host location?
nest dueling
intermediate host location
long distance host location
what are cues used in host finding
visual body odor CO2 water vapor from breath lactic acid oxidation products butanol (bacteria product in ruminants) heat source
morphological adaptation: body shape
allows arthropod movement while on the vertebrate host and enable them to hide in tight spaces when off the host
arthropod body shapes are either ___ or ____
dorsal-ventrally flattend (majority) laterally flattened (fleas)
mouthparts are either
chewing, piercing and sucking, sucking
immunosuppression of defenses
allows arthropods to avoid detrimental effects of the vertebrate host defense
blood meal feeding and digestion
through successfuL blood meal, arthropods acquire and transmit disease agents, acquire nutrients for reproduction
How do arthropods obtain blood
telmophagy (pool feeding) and solenophagy (directly from blood vessel)
