Phylum Annelida (Earthworms)

What trait first appeared in Phylum Annelida?

We see a true body cavity

What are the two classes of Phylum Annelida?

Oligochaeta and Hirudena

What is the Coelom?

main Body Cavity surrounding and containing the digestive tract and other organs

What are the functions of the Coelom?

Circulates Nutrients around the body and acts as a hydrostatic skeleton

What Animal represents Oligochaeta?

Earthworms

Know the function of Linked Segments

(2) The worm has a Segmented Body

Know the function of the Brain

(3) Controls the body functions

Know the function of the Nerve Cord

(4) Sends Signals from the Brain to the Ganglia

Know the function of the Ganglia

(5) Sends Signals from Neve cord to Body Segments

Know the function of the Prostomium

(7) Nose like protrusion that pushes dirt into the Buccal Cavity

Know the function of the Mouth

(8) Where food Enters

Know the function of the Pharynx

(9) Muscular organ that pushes dirt down the digestive tract

Know the function of the Crop

(10) Stores the dirt before it enters the gizzard

Know the function of the Gizzard

(11) The Gizzard Grinds

Know the function of the Anus

(13) Where waste exits

Know the function of the Dorsal Blood Vessel

(14) Carries Blood to the Head

Know the function of the Aortic Arches

(15) 5 very simple hearts rhat pump blood throughout the body

Know the function of the Clitellum

(20) Makes the Egg

What kind of Circulatory System do Earthworms have?

A closed Circulatory system

What is a Closed Circulatory System?

blood flows through blood vessels

How do Earthworms Breathe?

lacking a Respiratory system they breath through Cutaneous Respiration

What is Cutaneous Respiration?

Respiration form when gas exchanges by moving across the skin

What Animal represents Hirudena?

Leeches

What are Leeches?

Segmented parasites which suck blood from other animals

Why are the two things they release into their victims

anaesthetics (numb pain receptors) and anticoagulants (stops blooding clotting)