Annelids

Earthworms

Anatomy VocabularyAnatomy Vocabulary• Anatomy Anatomy – body parts– body parts• Body SystemsBody Systems – Digestive System, Nervous

System, Circulatory System, Excretory System, Muscular System

• CropCrop – stores food before blender – stores food before blender• GizzardGizzard – like a small blender – like a small blender• ClitellumClitellum – reproductive organ – reproductive organ• RespirationRespiration – bringing gasses in and out of

the body or cellular respiration

Annelids are SegmentedAnnelids are Segmented• Annelids are made of many small

segments each with a similar anatomy.

• Segments allow for back-up incase of damage to another segment.

SSTERNGRRTERNGRR• What do animals synthesize?

• Proteins

SSTTERNGRRERNGRR• What do worms need to transport around

their bodies?

• How do worms transport things around their bodies?

• Oxygen, CO2, nutrients

Closed Circulatory SystemClosed Circulatory System

• Worms have two main vesselsvessels.

• One on the top and one on the bottom.

• They also have a connecting vessel in each segment.

• Several connecting veins near the head have pumping capabilities.

STSTEERNGRRRNGRR• What do worms need to excrete from their

bodies?

• Nitrogen• Water• Salts• Solid waste• CO2

Excretory SystemExcretory System• Worms have a tiny little mini kidney in

each segment.

• Each one passes wastes directly to the outside through the skin.

STESTERRNGRRNGRR• What kind of respiration do worms do?

• Aerobic Cellular Respiration

Respiratory SystemRespiratory System• Worms have no respiratory system.

• They breath through their moist skin by diffusion. It has to be moist.

• Is this an advantage or a disadvantage?

STERSTERNNGRRGRR• Worms are heterotrophs (consumers).• Where do worms get their nutrients?• Eat soil• What is name for organisms that use the last

bit of energy left in dead material and return the nutrients to the soil?

• Decomposers, mix soil, air into soil• http://www.wormvideoclips.com/category/

weird-worm-videos/

Digestive SystemDigestive System• Worms have a central tube that runs the length

of the body.• They do internal digestion.• They have a mouth, throat, and a crop.• Then the crop feeds food to the gizzard which

grinds it and passes it to the intestine.• The intestine absorbs and passes food to the

vessels in each segment.• The digestive track dumps out solid waste from

the anus.

STERNSTERNGGRRRR• What type of cell division copies cells and

allows organisms to grow?

• Mitosis

• Worms hatch from eggs and grow larger.

STERNGSTERNGRRRR• Worms are ectothermic. They have to be

in the correct environment to maintain homeostasis. What can they do then?

• Move

Muscular SystemMuscular System• Under the skin is a

layer of circular muscles.

• Muscles contract and relax in a pattern.

• Worms move in an undulating style.

• Tiny hairs under the body help to grab the ground.

STERNGSTERNGRRRR• How do they control their movement and

other internal regulations?

• How do they sense their environment?

• Nervous system.

Nervous SystemNervous System• Worms have a “head” with a brain.

• The brain surrounds the mouth area.

• There is a central nerve cord.

• Each segment has nerves that branch off the central cord.

• Why is it important to have a brain?

STERNGRSTERNGRRR• What is a hermaphrodite?

• Both sexes.

• What type of cell division produces gametes?

Reproductive SystemReproductive System• Can reproduce by sexual and asexual

means.• The ClitellumClitellum is a section of skin that

makes a sac or cocoon for the fertilized eggs.

• During sexual reproduction both worms give sperm to the other’s clitellum.

• Can drop sections of the clitellum to do asexual reproduction.

InsectsGrasshopper,

Butterfly, & Beetle

Anatomy VocabularyAnatomy Vocabulary• Body SystemsBody Systems – Digestive System, Nervous

System, Circulatory System, Excretory System, Muscular System, Skeletal System, Respiratory System

• Spiracle – holes for air to enter.

• Tracheal Tubes – tubes that bring air from the spiracle to the inside of the body.

• Malpighian Tubules – tubes that filter the blood.

InsectsInsects• Insects have semi complex body systems.

SSTERNGRRTERNGRR• What do animals synthesize?

• Proteins, Lipids, Nucleic

• Acids,

• Large Carbohydrates

SSTTERNGRRERNGRR• What do insects need to transport around

their bodies?

• How do insects transport things around their bodies?

• Oxygen, CO2, nutrients

Open Open Circulatory SystemCirculatory System

• Insects have a primitive heart.

• The heart is a giant vessel at the top of the body.

• It pumps green blood.

• No veins.

STSTEERNGRRRNGRR• What do insects need to excrete from their

bodies?

• CO2

• Nitrogen• Water• Salts• Solid waste

Excretory SystemExcretory System• Insects have two Malpighian TubesMalpighian Tubes.

• They filter the blood and pass urine to the digestive track.

• Why would it be a disadvantage to dump urine into the digestive track?

• It could get re-absorbed.

STESTERRNGRRNGRR• What kind of respiration do insects do?

• Aerobic Cellular Respiration

• What kind of gas goes in?

• Oxygen

• What kind of gas goes out?

• Carbon Dioxide

Respiratory SystemRespiratory System• Insects have a tracheal systemtracheal system.

• Their movements bring air into the spiraclesspiracles.

• Tracheal tubesTracheal tubes bring air to the open circulatory system.

STERSTERNNGRRGRR• Insects are heterotrophs (consumers).

• Where do insects get their nutrients?

• Eat plants or insects

• What is the name for an organism that only eats producers?

• Herbivores

• What is a name for an organism that eats only consumers?

• Carnivores

Digestive SystemDigestive System• Mouth – specialized for chewing, sucking,

or piercing.

• Simple digestive track to absorb nutrients.

STERNSTERNGGRRRR• Insects can grow and develop in two ways.

• Egg• LarvaeLarvae• PupaPupa• Adult

• Insects moltmolt their old exoskeletonexoskeleton and grow a new one.

• Egg• NymphNymph• Adult

eggsnymphs winged

adult

STERNGSTERNGRRRR• Insects are ectothermicectothermic. They have to be

in the correct environment to maintain homeostasis. What must do?

• Move

Muscular Skeletal SystemMuscular Skeletal System

• Insects have muscles and an exoskeletonexoskeleton that work together for movement.

• Muscles don’t push.• Two work in opposite

directions.

STERNGSTERNGRRRR• How do they control their movement and

other internal regulations?

• How do they sense their environment?

• Nervous system

• Five senses .

Nervous SystemNervous System• Insects have a brain.

• Insects have a nerve net that branches from two central nerves that run on the belly.

• Insects have antennaeantennae for smelling and touching the environment.

• Insects have simple eyessimple eyes and compound compound eyeseyes.

STERNGRSTERNGRRR• Insects lay eggs.

• Most do sexual reproduction but a few can do asexual reproduction by budding.

• Can be internal or external fertilization.

Damsel Fly Mating

• Fireflies

• Bedbug

• Praying Mantis

• Bee

• Fly