1. worm fACTS

2. Arthropoda ”jointed foot”
Blackworm
Earthworm
Classification
Lumbriculus variegatus
Lumbricus Terestris
WOWBug
Blackworm
Earthworm
Human
Kingdom
Animalia
Phylum
Arthropoda ”jointed foot”
Annelidia
“tiny rings”
Chordata- has backbone
Class
Insect
Oligochaeta-
Oligo= few
Chaeta= hairs
on each body segment
Clitellata-
Having a clitellum
Mammalia- nurse young
Other annelids:
Leeches

3. Obtain Nutrients/Create energy (cellular respiration)
Blackworm
Earthworm
Fresh water invertebrate that feeds on decaying vegetation and microorganisms
invertebrate that live in the soil and eats decaying vegetation (leaves and roots)
Breathing/gas exchange
Occurs in the tail, it takes in oxygen through skin
forms right angle at water surface
gas exchange occurs between outside air and pulsating blood vessel
Earthworm 'breaths' through its moist skin.
Oxygen from the air dissolves in the moisture on the worms skin and then travels into the skin blood capillaries. 

4. Reproduction Blackworm Earthworm Nervous System
Hermaphroditic – contain both male and female sex organs
Sexual – not common
Sperm exchanged > produce cocoons containing 4-11 fertilized eggs
  After 2 weeks > new worm emerges about 1 cm in length-
2. Asexual- regeneration - can be divided into smaller pieces and form a new worm
Difficult to determine life span because constantly regenerating
Sexual –common method
Sperm exchanged > produce cocoons containing 4-20 fertilized eggs
  After 2 weeks > new worm emerges about 1 cm in length-
Can happen every 10 days
2. Regeneration but only from clitellum to posterior
Lifespan 4-8 years
Nervous System
Nerve Cord_- runs entire length of body- located beneath intestines

5. Movement : Crawling or Corkscrewing
Muscles
Two Layers Line Body - provide movement
- controlled by Nerve Cord
Circular - around body
Longitudinal- length of body
Together cause constricting
and lengthening followed by
increasing diameter and shortening
Allow blackworm to move in corkscrew fashion
in water, swimming short distances or
crawling through soil
Blackworm
Earthworm
2. Chaetae
2 pairs of bristles located on each segment
- used to anchor worm and increase traction
- help worm crawl
2. Setae
4 pairs located on each segment
- used to anchor worm and increase traction
- help worm crawl

6. Digestion/Excretion Has complete digestive tract
Blackworm
Has complete digestive tract
including mouth and anus
- Excretes waste gasses through its skin
Earthworm

7. Blackworm Circulation System
- consists of dorsal, ventral and lateral vessels
How does it work?
Contracting muscles around posterior vessel form waves “like opening and closing fist” and move blood from posterior end toward anterior end
Blood flow
Starts at posterior end “pulses” through dorsal vessel toward anterior end
Returns to tail through ventral vessel no “pulsing”
Lateral vessels supply blood to segments
Types of Circulatory Systems-
a. Closed- blood moves through body in vessels [arteries/veins]
b. Open- blood not contained in vessels, blood bathes all internal
organs
BLACKWORMS HAVE A CLOSED CIRCULATORY SYSTEM

8. Earthworm Circulation System
consists of dorsal, ventral vessels and five hearts/aortic arches
How does it work?
Blood flow
Starts at anterior end where 5 aortic arches /hearts are located
Blood pulses through dorsal and ventral vessels to ward the posterior
EARTHWORMS HAVE A CLOSED CIRCULATORY SYSTEM

9. Respond to Environment
Blackworm
Earthworm
photoreceptors located in the head, used to detect light or vibrations
Protective Response
When at surface of water, tail of worm can detect shadow [using
photoreceptors ] or sudden vibration
photoreceptors – nerve cells that can detect light
Rapid Reflex- responds by quickly contracting its muscles, withdrawing tail from predator

10. So…..
HOW DOES IT?.....