1. Classification of Animals
Invertebrates
PowerPoint Created by:
8th Grade Boys
Instructor: Mr. Raza
Science

2. Abid Talukder Ahmed Ali Samariddin Fazliddinov Mohammed Khan
Arthropods
Abid Talukder
Ahmed Ali
Samariddin Fazliddinov
Mohammed Khan

3. Characteristics
Arthropods include such familiar animals as insects, spiders, centipede, and crabs.
Appendages are structures such as claws, legs, and antennae that grow from the body.
Arthropods have a rigid body covering called an exoskeleton. It protects and supports the body and reduces water loss. An exoskeleton doesn’t grow and must be shed periodically as the animal grows.
The young of many arthropods don’t look anything like the adults. This is because many arthropods completely change their body form as they mature. This change in body form is called metamorphosis.

4. Arthropods

5. Cnidarians and Annelids (Segment worms)
Zulkar Naim
Yehia Ahmed
Ahmed Saddique
Hassan Al-katabi

6. Characteristics of Cnidarians
They sexually and asexually.
They have neither a head nor a brain, but a mouth, which is the single body opening.
Cnidarians include jellies, sea anemones, hydra, and corals.

7. Cnidarians

8. Annelids (Segment worms)
Their body is made of repeating segments or rings to make worms flexible.
Segments have nerve cells, blood vessels, digestive tract, and coelom.
The coelom, or internal body cavity, separates the internal organs from the body wall.
They have a closed circulatory system and digestive system.
Move through soil by eating the soil, which contains organic matter.

9. Annelids

10. Echinoderms By:- Nafa Aljabyali Sulejman Muratovic

11. What is it ?
Echinoderms are an example of an Invertebrate.Some echinoderms are carnivores ex: starfish.
Echinoderms can regenerate missing limbs, arms, spines - even intestines (for example sea cucumbers)
Echinoderms are protected through their spiny skins and spines. But they are still preyed upon by shells (like the triton shell), some fish (like the trigger fish), crabs and shrimps and by other echinoderms like starfish which are carnivorous. Many echinoderms only show themselves at night ( nocturnal), therefore reducing the threat from the daytime predators.

12. Characteristics of an Echinoderm
Spiny skin
Water vascular system that aids in movement and obtaining prey
Have radical symmetry
Supported and protected by an internal skeleton made up of bone-like plates.
Simple nervous system
Has no head or brain.

13. Examples

14. Flatworms & Roundworms
Idrees Attareb
Wael Alesaei
Omear Alomari
MD Amin
Elvian Lukovic

15. Characteristics
Unlike sponges and cnidarians, flatworms search for food. Flatworms are invertebrates with long, flattened bodies and bilateral symmetry. Their soft bodies have hree layers of tissue organized into organs and organ systems. Planarians are free-living flatworms that have digestive systems with one opening.
Round worms are the most widespread and diverse animal group on earth. Billions can live in an acre of soil. A roundworms body is described as a tube within a tube, with a fluid filled cavity between in the two tubes. The cavity seperates the digestive tract are more complex than flatworms because their digestive tract has two openings.

16. Images
flatworm
flatworm
v.s
Roundworm
Roundworm

17. Ahmad Chaudhry Mohammed Hammad Yahya Hamdeh Ashraf Sawal
Mollusks
Ahmad Chaudhry
Mohammed Hammad
Yahya Hamdeh
Ashraf Sawal

18. Characteristics
All mollusks are eaten by humans. Mollusks are soft bodied invertebrates that usually have a shell. They also have a mantle and a large muscular foot. The mantle is a thin layer of tissue that covers the mollusks body. Water dwelling mollusks have gills in the mantle cavity. Mollusks have a digestive system with two openings. Many mollusks also have scratchy, tongue like organ called the radula. The radula has rows of fine, teeth like projections that the mollusk uses to scrape off small bits of food.

19. Some mollusks have an open circulatory system, which means they do not have vessels to contain their blood. Instead, the blood washes over the organs, which are grouped together in a fluid-filled body cavity. Others have a closed circulatory system in which the blood is carried through blood vessels instead of surrounding the organs.

20. Pictures
Scallops are used to measure an ecosystems health because their sensitive to water quality.
Many species of conchs are becoming threatened species because their over harvested for food.

21. Malik Alkutiany Asad Pardakulouv Affan Alam Anas binmahbub
SPONGES
Malik Alkutiany
Asad Pardakulouv
Affan Alam
Anas binmahbub

22. Characteristics
The soft bodies of many sponges are supported by sharp, glass-like structures called speckles. Other sponges have a material called sponging. Sponging is similar to foam rubber because it makes sponges soft and elastic.
Sponges can reproduce asexually and sexually. Asexually reproduction occurs when a bud on the side of the parent sponge develops into a small sponge.
New sponges may also grow from pieces of a sponge .Each piece grows into a new identical sponge

23. Introduction
Approximately 1500 species of sponges had been identified.
Most species of sponges live in the ocean, just like the one below but some live in fresh water.
Adult sponges are sessile ,meaning they are attached to one place.
They are filter feeders filtering food out of the water that flows through there body.