Phylum Arthropoda Flashcards
Arthropod characteristics
Jointed legs
Hard exoskeleton
Segmented body
Well developed head
Feeding appendages
Active and energetic
Body plan
Appendages adaptable to suit for sensory, feeding, locomotion, and reproduction
Body wall
Hard exoskeleton
Exoskeleton secreted by epidermis
2 major layers include epicuticle and procuticle
Movement
Every form of movement found in arthropods
Have very complex muscular system
Feeding & Digestion
Every mode of feeding
Have 4-6 pairs of feeding appendages
2 main types of appendages are chelicerae and mandibles
Have well developed digestive tract
Respiration
Gills
Book gills
Lungs
Book lungs
Trachea
Circulation
Simple open circulatory system
Coelom becomes hemocoel
Has dorsal heart
Nervous system
Dorsal brain and double nerve cord
Sense organs
Ocelli
Compound eyes
Antennae
Chemoreceptors
Tactile hairs and spines
Statocysts
Excretion
Antennal glands
Malpighian tubules
Coxal glands
Reproduction and development
Dioecious
Parthenogenesis
Origin & Evolution
Soft cuticle of segmented worm hardened by additional proteins and calcium
Hard sections separated from each other by flexible structures and joints
