Invertebrates adaptation morphology anatomy and life

Starfish larvae are bilaterally symmetricwhereas the adults have fivefold symmetry Echinoderms Greek for spiny skin is a phylum which contains only marine invertebrates. The adults are recognizable by their radial symmetry usually five-point and include starfishsea urchinssand dollarsand sea cucumbersas well as the sea lilies. The phylum contains about living species[49] making it the second-largest grouping of deuterostomes a superphylumafter the chordates which include the vertebratessuch as birdsfishesmammalsand reptiles.

Invertebrates adaptation morphology anatomy and life

Conservation What is an Invertebrate? Animals lacking the vertebral column or backbone are referred to as invertebrates. Presently, there are 1. Some common examples of invertebrates are insects like spiders, flies, beetles, butterflies, freshwater and ocean animals like snails, lobsters, mollusks, and larger animals like sponges, sea stars, and octopuses.

Evolution Invertebrates have been on the earth long before vertebrates came into existence.

Invertebrates adaptation morphology anatomy and life

As the origin of life began with single-cell organism, they grew and developed into more complex, multi-celled small invertebrates. The first recognized invertebrates were soft-bodied marine animals, like trilobites, one of the earliest extinct groups of arachnomorph arthropods.

Gradually, land invertebrates developed, with countless insects and annelids having been existed for thousands of years. So, they are divided into the following eight major phyla depending on their type, appearance and anatomy: Includes all sponge species found in fresh and saltwater habitats, characterized by a long, cylindrical body full of pores ostia that allow water to run through all parts of the body.

There are a number of different species of sponge, e. Consists of over 10, marine and freshwater animals including corals, sea anemones, and jellyfish. These animals are usually biradially both bilaterally and radically symmetric, with only one external opening in their ventral side, sometimes surrounded by tentacles, like in jellyfish.

This phylum is further divided into four classes, Anthozoa corals, sea anemonesScyphozoa jellyfishCubozoa box jellies Invertebrates adaptation morphology anatomy and life, and Hydrozoa hydra. Another class, Staurozoa stalked jellyfishhas recently been recognized.

Soft-bodied invertebrates like flatworms and tapeworms belong to this phylum, characterized by a bilaterally symmetrical, unsegmented body. They can be of various colors from black and gray to bright shades of orange and green. This phylum is separated into two groups, Catenulida and Rhabditophora.

Includes over 25, recognized species, the nematoda phylum consists of various parasitic roundworms well-known for causing various diseases in humans and other mammals, including hookworm, common roundworm, pinworm, and trichina.

There are around 85, extant species belonging to this phylum, including the largest of all invertebrates, the octopus and squid. All snails, clams, slugs, and cuttlefish are mollusks. There are six extant classes in this phylum: Caudofoveata, Solenogastres, Polyplacophora chitonsMonoplacophora certain molluscsGastropoda snails and slugsCephalopoda octopuses, squids, nautilusBivalvia oysters, mussels, clamsand Scaphopoda tusk shells.

Two extinct classes, Rostroconchia and Helcionelloida are also there. The cephalopods are considered the most intelligent among all invertebrates, with octopus thought to have the highest level of intelligence as they have a relatively large brain.

With over 17, extant species, this is a large phylum of invertebrates including all worms, like earthworms, tubeworms, and leeches.

They are characterized by a segmented body. Annelida is classified into a few subgroups: Arthropods include various saltwater, freshwater, and land species ranging from all small and large insects, scorpions, centipedes to marine creatures like crustaceans.

This phylum is divided into five subphyla: Trilobites, Chelicerates spiders, mites, scorpions, horseshoe crabMyriapods centipedes and millipedesCrustaceans lobsters, shrimps, crabsand Hexapods all insects including butterfly, moth, bee, ant etc.

Another phylum of marine invertebrates, including around extant species, the Echinoderms are characterized by their five-point radially symmetrical body, with common examples including star fish, sand dollars, and sea cucumbers. This phylum belongs to the superphylum Deuterostomia, as does Chordata.

Anatomy Respiratory System The respiratory mechanism may vary between the phyla, but all invertebrates need oxygen to survive, and they use the basic method of diffusion where substances move to a high-concentration from an area of low concentration to get it.

Poriferans spongecnidarians jellyfishnematodes roundwormsand platyhelminth flatworm species use diffusion as their primary means of absorbing oxygen from the environment.

Their thin outer skin takes part in gas exchange, taking in oxygen and excreting carbon dioxide. In case of sponges, the countless pores covering their body take in oxygen from the water traveling through these pores. Species belonging to the other four phyla mollusca, annelida, arthropoda, echinodermata have slightly advanced respiratory systems.

Two respiratory organs present in most of them are a trachea and gills. Some small animals, including scorpions and snails, have a diffusion lung unlike the ventilation lungs in vertebrates. Trachea is the primary respiratory structure in insects, where the main tracheal tube divides into multiple tubes to supply to the different parts of the body.

Echinoderms star fish, sea cucumber have gills, and they also use their tube feet to get oxygen. Digestive and Excretory Systems Invertebrate digestive system can be divided into two basic types, a gastrovascular cavity and alimentary canal. The gastrovascular cavity, present in jellyfish, sea anemones, flatworms, and coral, has just one opening.Essay about Invertebrates: Adaptation, Morphology, Anatomy, and Life Cycles Discuss the following invertebrates with respect to their Adaptation, Morphology, Anatomy and Life Cycles.

TAENIA ASCARIS FASCIOLA NEREIS {Dr Daramola F.Y.} TAENIA Introduction The beef tapeworm, Taenia saginata, is a cestode parasite acquired in humans through the. Invertebrates Jellyfish The Jellyfish are truly a wonder of nature. They have always been objects of deep observation and admiration.

COURSE: BLY (BASIC INVERTEBRATE ZOOLOGY) TOPIC: Discuss the following invertebrates with respect to their Adaptation, Morphology, Anatomy and Life Cycles. TAENIA ASCARIS FASCIOLA NEREIS {Dr Daramola F.Y.

Invertebrates adaptation morphology anatomy and life

The importance and originality of this book lie in its functional approach to the study of invertebrate anatomy. The authors deal with all the major groups of invertebrates, illustrating the text with realistic drawings based on whole or dissected animals.

What is Functional Morphology? Quite simply, it is the study of organism structure (i.e., anatomy) and function (e.g., how it works in a particular context). Understanding the basic structure and function of organisms is one of the oldest areas of research pertaining to the natural world.

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BIOL Comparative Veretebrate Anatomy. A systematic study of the vertebrate body. Comparative approach will explore the anatomical similarities and differences among major vertebrate taxonomic groups. Morphology, systematics, natural history, taxonomy, and evolution of living and fossil mammals.

A survey of vertebrate adaptation. Chapter Invertebrates. STUDY. List the four classes of Cnidaria and distinguish among them based on life cycle and morphology. a. Scyphozoa: jellyfish like Aurelia; dominant medusa Describe the anatomy and generalized life cycle of a tapeworm.

The tapeworm has a head called the scolex. On this head there are teeth that hook to the.

morphology | Definition & Examples |