arthropods chapter 38

Crayfish have - a dorsal heart and ventral nerve cord, a ventral heart and dorsal nerve cord, an exoskeleton, an endoskeleton.

A dorsal heart and ventral nerve cord, an exoskeleton?

Chelicera

A spider's poison fangs.

pedipalp

Aids in holding food & chewing. They are sensory organs that spiders(and other arthropods with them) use to taste and smell. The Spiders also use them to help manipulate food to the mouth parts (chelecera) . In male spiders these also serve to deliver sperm to the female during mating.

Spiders, ticks, scorpions, and mites belong in the CLASS - Arachnida, Insecta, Crustacea or Myriapoda.

Arachnida

Tagma

Body sections made by fused smaller segments together. Familiar examples are the head, the thorax, and the abdomen of insects.

malpighian tubules

Excretory organs in many insects and arachnids.

compound eye

Eye consisting of an array of numerous small visual units.

Cephalization

Functions type of brain that arthropods have. a tendency in the development of animals to localization of important organs or parts in or near the head. it allowed for the evolution of more effective mouth-parts for capturing and processing food.

Are crayfish Invertebrates or Vertebrates?

Invertebrates

nauplius

Larva with 3 pairs of arms and an eye. Crustaceans have these.

Which of the following are CRUSTACEANS? Lobster, Crab, crayfish or butterfly.

Lobster, Crab & Crayfish

Green Glands

Main excretory organs (excrete nitrogen waste/osmoregulation) in crayfish.

Which of the following are examples of the Excretory organs? Green gland, spiracles, malpighian tubules, Nephridia.

Malpighian tubules.

All arthopods have _______________________ circulation.

Open

Do crayfish have open or closed circulation - Open or Closed.

Open

Molting

Periodic shedding of the exoskeleton so an animal can grow bigger.

Cheliped

Pincher claw on a crustacean.

What is Osmoregulation?

Process used to control the amount of salt and water in the body.

The hairs that project from the exoskeleton of a crayfish are used to - Create water currents over the surface of the crayfish, sense vibrations and chemicals in the water, retain body heat, protect the crayfish from predators.

Sense vibrations and chemicals in the water.

Are crayfish Sexual or Asexual reproduction

Sexual

Swimmerets

Structures on the abdomen of a crayfish that transfer sperm (males), carry and circulate water over developing embryos (females).

Chitin

The main ingredient in the exoskeleton of the arthropods and crustaceans, and it is also in the cell walls of the fungi.

Spinnerets

The structures on the abdomen of a spider that produce silk.

Calcium Carbonate

The substance that makes some arthropod skeletons HARD (clam shells, echinoderm ossicles, human bones and teeth too).

Centipeds and milipedes differ in what ways - the way their bodies are shaped, the kind of circulatory system, their feeding habits, they have the number of legs they have on each segment?

The way their bodies are shaped, their feeding habits and the number of legs they have on each segment.

Centipedes have poisonous claws that are used to kill prey. True or False

True

Organisms with an exoskeleton have to molt to grow bigger. True or False

True

When an arthropod is molting it is extremely vulnerable to predators and usually remains in hiding. True or False

True

crayfish are decapods. True or False

True

maxilliped

Up to the first three pairs of legs are modified to maxillipeds, which assist manipulation of food items by passing food forward to the mandibles for chewing or to the maxillae for cutting into smaller pieces.

What are all of the features arthropods share with earthworms - a closed circulatory system, a segmented body, cerebral ganglia and a ventral nerve cord, cephalization, bilateral symmetry.

a segmented body, cerebral ganglia and a ventral nerve cord, cephalization, bilateral symmetry.

What is the maxilla

bones that are located behind the mandible used to help with feeding by cutting up food and breathing.

Which of the following are examples of Respiratory Organs? book lungs, tracheae, gills, green glands

book lungs, tracheae, gills.

Mandibles are - excretory organs, chewing mouthparts, pincer claws, poisonous stingers.

chewing mouthparts.

A crayfish uses its CHELIPEDS to - poison enemies, defend itself and capture food, fertilize its eggs, excrete nitrogen waste.

defend itself and capture food.

bile

digestive enzymes

Do crayfish have internal or external fertilization?

external

Aquatic Crustaceans have a bipinnaria larva with wings and 5 eyes. True or False

false

The respiratory organs in crayfish are the - lungs, skin gills, gills or nephridia.

gills.

Molting happens when the - growing organism puts pressure on the old exoskeleton, animal is 1 year old, new skeleton forms on top of the old one, animal wants to reproduce.

growing organism puts pressure on the old exoskeleton.

In Latin, Arthropod means what?

jointed foot.

In a crayfish, green glands excrete nitrogen waste and excess water through - the anus, the spiracles along the body, small pores at the base of the antennae, the digestive gland.

small pores at the base of the antennae.

A crayfish has teeth in its - esophagus, mouth, stomach green glands.

stomach