Kingdom Animalia - INVERTEBRATES PT. 2

Chitin

a polysaccharide; major component of arthropod exoskeletons

Closed circulatory system

a circulatory system in which blood remains contained within vessels

Coelom

fluid filled cavity surrounded by muscle tissue; true body cavity

Exoskeleton

an exposed skeleton, external to other body tissues

Hemolymph

a circulating blood-like fluid found in some invertebrates

Mandibles

chewing jaw-like mouthparts of arthropods

Mantle

a tissue that secretes a calcium carbonate shell in many molluks

Open circulatory System

a circulatory system in which fluid circulates within a body cavity

Segmentation

division of an animal’s body into segments

water vascular system

a hydraulic system for movement and circulation in echinoderms

Ostia

opening in the heart’s wall

Phylum Annelida

a group of bilaterally symmetrical worms known for their segmented bodies.

Do annelids display cephalization?

yes

What kind of gut do annelids have?

complete with a coelom

What kind of circulatory system do annelids have?

closed circulatory system

What kind of brain do annelids have?

cerebral ganglia functions as the rudimentary brain connected with a ventral nerve cord

What functions as simple kidneys for excretion of nitrogen wastes in anndelids?

Nephridia

What provides traction for movement of some annelids through soil?

setae

Annelid - Lumbrius (earthworm)

Know the parts

Annelid - Leech

A type of parasite known for feeding on the blood of other animals, having a segmented body and often used in medicinal applications.

Annelid - Bristle worm

A type of marine annelid characterized by bristles called chaetae, often found in diverse habitats and exhibiting a variety of feeding strategies.

Phylum Arthrodpoda

A large phylum of invertebrate animals that include insects, arachnids, and crustaceans, characterized by exoskeletons, segmented bodies, and jointed appendages.

What kind of appendages do arthropods have?

jointed

What kind of skeleton do arthropods have?

exoskeleton with chitin

What is the water proofing coat on arthropods?

A waxy layer called the cuticle.

What kind of symmetry do arthropods have?

bilaterall

What are the three major segments of arthropods?

head, thorax, and abdomen

What kind of gut do arthropods have?

complete with a coelom

What kind of circulatory system do arthropods have?

open circulatory system containing hemolymph

What are other distinctive characteristics of arthropods?

jointed mouthparts

antennae

compound eyes

What kind of eyes do arthropods have?

compound eyes

Arthropods - horseshoe crab

Arthropods - spider and insects

two major classes of arthropods, characterized by segmented bodies, jointed appendages, and exoskeletons.

Arthropods - crayfish

Phylum Molluska

A diverse group of invertebrates, including snails, clams, and octopuses, known for their soft bodies, many possessing a hard shell, and a muscular foot used for locomotion.

Are mollusks segmented?

no

Some but not all mollusks display _____ in their head.

Cephalization

What kind of gut do mollusks have?

complete gut within a coelom

What kind of circulatory system do mollusks have?

open circulatory system

What are other distinctive features do mollusks have?

mantle

secretes calcium carbonate to produce a hard shell

What do mollusks have to scrap food with?

radula

Arthropod - clam shells

have a mantle and ventral muscular food

Arthropod - whelk shells

have a mantle and ventral muscular food

Arthropods - Squid and octopus

Lack a shell

highly developed nervous system

closed circulatory system

bilateral symmetry with cephalization

Phylum Echinodermata

A group of marine animals characterized by radial symmetry, a water vascular system, and a calcareous endoskeleton. Examples include starfish, sea urchins, and sea cucumbers.

What kind of symmetry do echinoderms have?

radial

Are echinoderms segmented?

no

Echinoderms are our ____ invertebrate “relative”

closest

What kind of gut do echinoderms have?

complete

What kind of circulatory system do echinoderms have?

open circulatory system

Echinoderms water vascular system

is a network of fluid-filled canals used for locomotion, feeding, and gas exchange.

Kinds of Echinoderms

include sea stars, sea urchins, and sea cucumbers.

Madreporite

is a sieve-like structure on the upper surface of echinoderms that regulates water intake into the water vascular system.

Do echinoderms display cephalization?

no