Earthworms Virtual Dissection
Bring a bag, looking at this will make you use it.
- Label organs of the earthworm
- List some background information of the organism
- Understand their taxonomy, evolution, ecology, and bodysystems
Earthworm's specific name is Lumbricus terrestris.
The scientific classification of an earthworm is Oligochaeta. Earthworms are hermaphrodites, which means that they have both male and female sex organs. Earthworms are also invertebrates, meaning they do not possess a skeleton.
Earthworms have a brown slimy skin that can camouflage with the soil to avoid detection. Earthworm's response to the environment by mostly hiding from the sun, it sense the sun as dangerous because it makes the earthworm less moist and if the earthworm is out on in the sun for a long time, it becomes dry.
Earthworms can live anywhere that has rich soil for them. Their predators can be any organisms that are common, birds, mouse, moles, or other insect that are bigger. An earthworm's prey is bacteria. The trophic level is at 5.0. The earthworm's niche is decomposing the soil. A flower and an earthworm's symbiotic relationship mutualism, earthworms provides air for plants by making air tunnels.
Oragn Functions (Internal)
- Mouth- take in the nutrients
- Brain- movement (thoughts)
- Pharynx- swallows the food
- Seminal Receptacles- container for semen
- Seminal Vesicles- where the sperms are produced
- Esophagus- moves the food from the pharynx to the crop
- Oviduct- receives the opposites worm's sperm
- Gizzard- chews the nutrients
- Ventral blood vessels- pumps blood on the ventral side
- Intestines- To process food and extract nutrients
- Hearts- pumps blood
- Calciferous glands- regulates the calcium and PH in an Earthworm's blood.
- Crop- the crop is used to store food
- Dorsal Blood Vessels- vessels connects to all the parts of the body on the dorsal side
- Typhlosole-more efficent absorption of digested nutrients
- Pseudo hearts- fake hearts that also pump blood around the body
External Organs of a Earthworm
Segments- excretion and digestion of waste
Setae- helps the earthworm to move
Clitellum- produce a sac that eggs can be deposited in
Anus- where waste leaves the organism's body
Sperm ducts- stores the sperm
Oh, so you are not disgusted?
If you want to dissect earthworms on your own, you can find them in your back yard, but just make sure you ask your parents before digging up their garden.
THE MORE YOU KNOW>>>FACTS
- When earthworms tunnel through the ground they bring air into the soil. This allows plant roots to grow more easily.
- More than 3,000 species of earthworm exist in the world
- Worms can have between 1-5 pairs of hearts.
- The earthworm does not have lungs and instead uses its skin to breath
- Worms are cold blooded and their body is made up of 80% water
- Worms typically live for about 3-4 years, however there have been some cases where they have lived for 15 years.
SAVE THE EARTHWORMS
Humans, yes you, you guys have made some big mistakes that kill earthworms by dumping chemical waste into the soil. Help them out and be sure to water your front, and backyard, but not too much. Earthworms may leave the soil because of too much water. Water holds much less oxygen than air and earthworms rely on the air in the soil for diffusing adequate oxygen through their skin. Earthworms can help your plants look nice by making holes in the soil and plant can take in more air, its a win-win for every organism.