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Annelids

Annelids. Earthworms. Anatomy Vocabulary. Anatomy – body parts Body Systems – Digestive System, Nervous System, Circulatory System, Excretory System, Muscular System Crop – stores food before blender Gizzard – like a small blender Clitellum – reproductive organ

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Annelids

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  1. Annelids Earthworms

  2. Anatomy Vocabulary • Anatomy – body parts • Body Systems – Digestive System, Nervous System, Circulatory System, Excretory System, Muscular System • Crop – stores food before blender • Gizzard – like a small blender • Clitellum – reproductive organ • Respiration – bringing gasses in and out of the body or cellular respiration

  3. Annelids 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.

  4. STERNGRR • What do animals synthesize? • Proteins

  5. STERNGRR • What do worms need to transport around their bodies? • How do worms transport things around their bodies? • Oxygen, CO2, nutrients

  6. Closed Circulatory System • Worms have two main vessels. • 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.

  7. STERNGRR • What do worms need to excrete from their bodies? • Nitrogen • Water • Salts • Solid waste • CO2

  8. Excretory System • Worms have a tiny little mini kidney in each segment. • Each one passes wastes directly to the outside through the skin.

  9. STERNGRR • What kind of respiration do worms do? • Aerobic Cellular Respiration

  10. Respiratory 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?

  11. STERNGRR • 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/

  12. Digestive 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.

  13. STERNGRR • What type of cell division copies cells and allows organisms to grow? • Mitosis • Worms hatch from eggs and grow larger.

  14. STERNGRR • Worms are ectothermic. They have to be in the correct environment to maintain homeostasis. What can they do then? • Move

  15. Muscular 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.

  16. STERNGRR • How do they control their movement and other internal regulations? • How do they sense their environment? • Nervous system.

  17. Nervous 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?

  18. STERNGRR • What is a hermaphrodite? • Both sexes. • What type of cell division produces gametes?

  19. Reproductive System • Can reproduce by sexual and asexual means. • The Clitellum 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.

  20. Insects Grasshopper, Butterfly, & Beetle

  21. Anatomy Vocabulary • Body 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.

  22. Insects • Insects have semi complex body systems.

  23. STERNGRR • What do animals synthesize? • Proteins, Lipids, Nucleic • Acids, • Large Carbohydrates

  24. STERNGRR • What do insects need to transport around their bodies? • How do insects transport things around their bodies? • Oxygen, CO2, nutrients

  25. Open Circulatory System • Insects have a primitive heart. • The heart is a giant vessel at the top of the body. • It pumps green blood. • No veins.

  26. STERNGRR • What do insects need to excrete from their bodies? • CO2 • Nitrogen • Water • Salts • Solid waste

  27. Excretory System • Insects have two Malpighian 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.

  28. STERNGRR • 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

  29. Respiratory System • Insects have a tracheal system. • Their movements bring air into the spiracles. • Tracheal tubes bring air to the open circulatory system.

  30. STERNGRR • 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

  31. Digestive System • Mouth – specialized for chewing, sucking, or piercing. • Simple digestive track to absorb nutrients.

  32. Insects can grow and develop in two ways. Egg Larvae Pupa Adult Insects molt their old exoskeleton and grow a new one. Egg Nymph Adult STERNGRR

  33. eggs nymphs winged adult

  34. STERNGRR • Insects are ectothermic. They have to be in the correct environment to maintain homeostasis. What must do? • Move

  35. Muscular Skeletal System • Insects have muscles and an exoskeleton that work together for movement. • Muscles don’t push. • Two work in opposite directions.

  36. STERNGRR • How do they control their movement and other internal regulations? • How do they sense their environment? • Nervous system • Five senses .

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