Presentation on theme: "Classification of Animals Invertebrates PowerPoint Created by: 8 th Grade Boys Instructor: Mr. Raza Science."— Presentation transcript:
Classification of Animals Invertebrates PowerPoint Created by: 8 th Grade Boys Instructor: Mr. Raza Science
Arthropods Abid Talukder Ahmed Ali Samariddin Fazliddinov Mohammed Khan
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.
Cnidarians and Annelids (Segment worms) Zulkar Naim Yehia Ahmed Ahmed Saddique Hassan Al-katabi
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.
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.
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.
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.
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.
Images flatworm Roundworm v.s
Mollusks Ahmad Chaudhry Mohammed Hammad Yahya Hamdeh Ashraf Sawal
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.
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.
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.
SPONGES Malik Alkutiany Asad Pardakulouv Affan Alam Anas binmahbub
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
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.