BIOL 111 Lecture Notes - Lecture 14: Striated Muscle Tissue, Myocyte, Neuromuscular Junction
5 Jul 2018
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BIOLOGY 110 LECTURE 14
ARTHROPODS
ECDYZOANS – that grow by moulting, sheds outer layer (cuticle or exoskeleton)
Protostomes: Priaulid worms: BC, marine worms
Nematomorphia – larvae in the worms are grown inside the host, when grown, the
larvae kills the host, found in swimming pools
Loricifera – small organisms, tiny marine sediment, attach firmly to substrates
Tardigrades (main phylum) – tiny organisms, 8 legs, similar to arthropods due to
segmented body, survive extreme weather conditions, aka “water bears” survive without
food for 30 days
Onychophora – velvet worms: tropical environment, closed relative to arthropods, like a
caterpillar, slim cannons,
Arthropods: most diverse phylum in the eukaryote group, composed of many taxon,
Diversity – Myriapodes: Scutigera (in your bed * please check when you get home)
Insects – dytiscus - diving bettle, predaceous, adults collect air under wings and use tis
to brethe underwater
Honey Bee – worker bees dance to communicate location of new food source
Arthropods: jointed foot:
Segmented externally and internally, CNS, jointed appendages with specialized
functions (jumping, feeding, etc.)
Rigid exoskeleton – ecdysozoan – moulting animal
-Once shed, the new one will take hours or even days in order to harden
Disadvantages: you will be vulnerable during the time that you shed and the time that it
hardens
-Inflexible and heavy
-Continuous growth in size is not possible
-Periodically shed
-Respiration through
-Requires a lot of energy in order to shed
Advantage; hard exterior coating to protect you from other animals (predators)
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BIOL 111 Full Course Notes
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Document Summary
Ecdyzoans that grow by moulting, sheds outer layer (cuticle or exoskeleton) Nematomorphia larvae in the worms are grown inside the host, when grown, the larvae kills the host, found in swimming pools. Loricifera small organisms, tiny marine sediment, attach firmly to substrates. Tardigrades (main phylum) tiny organisms, 8 legs, similar to arthropods due to segmented body, survive extreme weather conditions, aka water bears survive without food for 30 days. Onychophora velvet worms: tropical environment, closed relative to arthropods, like a caterpillar, slim cannons, Arthropods: most diverse phylum in the eukaryote group, composed of many taxon, Diversity myriapodes: scutigera (in your bed * please check when you get home) Insects dytiscus - diving bettle, predaceous, adults collect air under wings and use tis to brethe underwater. Honey bee worker bees dance to communicate location of new food source. Segmented externally and internally, cns, jointed appendages with specialized functions (jumping, feeding, etc. )
