Nematoda and Athropoda

Copious (Abundant) on planet

Nematoda

longitudinal muscles possessed by nematodes are used for

whip like movements

body symmetry of nematodes

bilateral symmetry, have a tapered presentation at both the anterior and posterior ends

parasitic species include

human roundworm, pin worm, hookworm, and trichina worm

most common worm found in humans

A. lumbricoides

Cause little disease but is the most parasitic worm in the US

E. vermicularis

cause of flow mental and physical growth in infected children

N.americanus feeds on its hosts by hooking into the intestine and sucking more blood that needed to sustain itself.

Causative agent of Trichinosis, causing extreme intestinal issues, and is acquired by the host through undercooked meats, esp pork

T. spiralis

Do nematodas have any respiratory/circulatory system?

No

Coelom in nematodas

Pseudocoel, serving as a hydrostatic skeleton

free living nematode

vinegar eels (Turbatrix aceti)

How many species in Arthropoda?

1,000,000 and higher

Clade of Arthropoda and nematoda

Ecdysozoa

body symmetry of Arthropoda

bilateral symmetry, triploblastic

_____ appendages, ______ digestive system, _______ circulatory system

jointed appendages, complete digestive system, open circulatory system

what are exoskeleton of arthropods made of?

chitin and protein secreted by epidermis underneath.

3 clades of athropoda?

Chelicerata, Myriapoda, and Pancrustacea

Chelicerata includes

arachinida (spiders, mites, ticks, scorpions) and meristomata (horeshoe crab)

Chelicerata ____ antennae, most have _____ eyes, small manipulatory appendages in spiders are observes as _____, _______ mandibles

lack\, simple\, fangs\, lack

what does Chelicerata use to form chelicerae?

The first pair of appendages added in feeding.

Chelicerata have 1 pair of ______, and 4 pairs of ______

pedipalps\, walking legs

formation of the clade pancrustacea includes

crustacean and insects

The only arthropods that have 2 pairs of antennae

crustacean

why are crabs, lobsters, crayfish, and shrimp known as decapods?

due to their 10 legs

majority of known species of arthropods

insects

Distinctive features of insects: _____ pairs of legs, _____ pairs of wings on the thorax

three pairs of\, two pairs of

defense mechanisms of Eastern lubber grasshopper

brightly colored making to ward off predators

where do grasshopper’s unpleasant odor come from?

thorax, which may be used in conjunction with its loud hissing noise as a form of intimidation (threaten)

Coelom development in arthropods

Eucoelomates

Body symmetry of Arthopods?

Bilateral symmetry