Lect 12 (Tardigrada, Onychophora & intro to arthropods)

what are those?

• microscopic

tardigrada

yellow

mouth

blue

• sharp

• used for piercing food items

stylet

red

• used for grinding & sucking

pharynx

black dots

ocelli

purple

• 8 pieces

legs

tardigrades are __ which means they are able to survive extreme environments

extremophiles

what are those?

Onychophora

Onychophora are exclusively __

terrestrial

how do onychophora catch their prey?

inject saliva & slurp the inside

how do onychophora respire?

tracheal system

onychophora have __ circulatory system and their blood doesnt carry __ but rather nutrients only

open, O2

__ is the opening of the tracheal system that’s exposed to the outside air (ALWAYS OPEN)

spiracle

(uni/di/triploblastic) onychophora are __

triploblastic

how do onychophora reproduce?

gonochoristic, internal fertilization (copulation)

onychophorans __ to grow

molt

what are the general characteristics of arthropods?

segmentation, rigid cuticle & open circulatory system

__ is a projection of living cell & functions as a sensory system

setae

how to differentiate between chaetae & setae?

• made from chitins & dead (C)

• used for deference, locomotion, & some mechanosensory (C)

• used only for sensory (S)

• have epidermal living tissue (S)