Althia Rickard
SOCIAL RELEVANT ISSUE Background Insects are by far the largest group of hexapod invertebrates within the arthropod phylum. They play a very important role in the environment and can be found anywhere in the world. They have a chitinous exoskeleton, a three-part body composed of a head, thorax, and abdomen. They also have three pairs of …
General Arthropod Characteristics • Coelomate, Triploblastic • Protostome (Ecdysoan) • Cephalization • Open circulatory system • Tagmatization • Exoskeleton made of Chitin • Jointed appendages • Molting (ecdysis) • Live in almost all habitats on the earth • Estimates of 30-100 million species! (mostly insects) …
Social Relevant Issue Background “Earthworms are found in the class Oligochaeta, phylum Annelida and are a tube-shaped, segmented worm. They are commonly found living in soil and feed on dead organic matter. Their digestive system runs through the length of their body and they conduct respiration through their skin……..” Click here …
+General Annelid Characteristics Coelomate, Triploblastic Protostome (lophotrochozoan) Cephalization Bodies are segmented, worm-shaped Setae (chaetae) Closed circulatory system Metanephridia Complete digestive system Marine, freshwater, terrestrial +Class Polychaeta (nearly all marine) + Parapodia function in locomotion and gas exchange, are highly vascularized and increase the surface area of …
Social Relevant Issue Background Schistosomiasis is in the phylum Platyhelminthes and class Trematoda. It is a parasitic flatworm responsible for serious infections in humans. It parasitizes blood capillaries of either the mesenteries or plexus of the bladder, depending on the infecting species. Schistosomiasis is a …
Live Specimen Class polychaete Class Polychaete Polychaetes are one of the classes of annelid, they are also known as the bristle worms and are generally marine invertebrates. Their bodies has a various amount of paraodia covering it that’s used for locomotion, sensation, or respiration. These paraodia have many …
Social Relevant Issue Background Jellyfish are classified in the kingdom: Animalia, phylum: Cnidaria and subphylum: Medusozoa. They are grouped into three categories; Scyphozoa which are true jellyfish, Cubozoa which are box jellyfish and Staurozoa which are stalked jellyfish. They have an umbrella-shaped body and long tentacles that extend …
Slides Planaria w.m. under microscope 4x (head) Planaria in 3 representative regions under microscope 10x Planarian is in the class Turbellaria. They live in both saltwater and freshwater ponds and rivers. However, some species are terrestrial. Planaria are capable of regeneration of lost body parts. For example, if a …
Phylum Platyhelminthes – Class Turbellaria – Class Cestoda – Class Trematoda + Phylum Platyhelminthes features Species in this categories are triploblastic (have three layers of skin), acoelomate, bilaterally symmetric. They have protostome (lophotrochozoan) They have a central nervous system and go through cephalization. They have …
Slides Hydra w.m under microscope 4x Hydra Nematocysts under microscope 40x Hydra Budding under microscope 4x Hydras are tiny, simple invertebrates that have a circulatory system similar to jellyfish. They are apart of the phylum Cnidaria, order Anthomedusae and class Hydrozoa. Typically found in freshwater ponds, lakes, and streams. They have a fluid-filled gastrovascular …