What's Inside?Earthworm Dissection!
By Ching-Hung Chang (Clement) Vu-PAP Bio-1
Objective
What are Earthworms?
Earthworm, Lumbricus Terrestris, are member of phylum Annelida. Having a brain and simple nervous system, Earthworms are considered the most developed worm. They are segmented and symmetric bilaterally. Earthworms have no respiratiory system; They intake oxygen directly through the skin. A simple circulatory system brings oxygen around the body.
Earthworms can be benificial to agriculture. Tunneling improves soil permeability. They bring up minerals underground to surface where plants can absorb. Earthworms can also help get rid of harmful chemicals.
Soil to Earthworm
Earthworms live in soil. In order to get around freely, earthworm resemble a streamlined shape and it produce mucus to make itself smooth. Earthworm recieve nutrients by eating soil and absorb the nutrient from the soil when it is in earthworm's digestive track.
Predator and Prey
Range
Dissection
Overview
Internal Anatomy
External Anatomy
Earthworm Digestive System
How Much Do You Know About Earthworms?
Take the quiz:
Source
Image 2: http://organicsoilsolutions.com/education-center/the-world-beneath-our-feet/
Image 3: http://jeffincypress.blogspot.com/2012_05_01_archive.html
Image 4: http://animals.nationalgeographic.com/animals/invertebrates/earthworm/
Image 5: http://www.biologyjunction.com/earthworm_dissection.htm
Image 6: http://www.earthwormsoc.org.uk/earthworm-information/earthworm-information-page-2
Source 1: http://www.mcwdn.org/Animals/Earthworms.html
Source 2: http://mypeoplepc.com/members/arbra/bbb/id19.html
Source 3: http://zannr.hubpages.com/hub/Earthworms-and-digestion