1 / 12

PORIFERA and CNIDARIA

PORIFERA and CNIDARIA. GERM LAYERS. Porifera. cnidaria. Two layers: Ectoderm Endoderm . None . SYMMETRY. porifera. cnidaria. Radial symmetry. No symmetry. COELOM: A fluid filled cavity in the body. Porifera. cnidaria. Acoelomate *Acoelomate: No coelom. Acoelomate.

dot
Download Presentation

PORIFERA and CNIDARIA

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. PORIFERA and CNIDARIA

  2. GERM LAYERS Porifera cnidaria Two layers: Ectoderm Endoderm • None

  3. SYMMETRY porifera cnidaria Radial symmetry • No symmetry

  4. COELOM: A fluid filled cavity in the body Porifera cnidaria Acoelomate *Acoelomate: No coelom • Acoelomate

  5. DIGESTIVE TRACT porifera Cnidaria Gastro vascular (functions in both digestion and distribution of nutrients) with a saclike digestive system with one opening. • No digestive tract. They filter feed instead. They rely on maintaining a constant water flow through their bodies to obtain food and oxygen and to remove waste.

  6. CEPHALIZATION porifera cnidaria None • None

  7. SEGMENTATION porifera cnidaria None • None

  8. SKELETON AND APPENDAGES porifera cnidaria Hydrostatic skeleton acts like a water-filled balloon to support body Some jellyfish have appendages known as “Oral arms” that hang from the bell near the mouth, and bring the captured prey to the mouth. • Have a substance called mesohyl that acts as an endoskeleton; mesohyl is stiffened by mineral spicules. • No appendages

  9. CIRCULATORY SYSTEM porifera Cnidaria Cnidarians lack a circulatory system. All the cells of cnidarians are in contact with the water, which has all of the oxygen and nutrients the simple animals needs. The use for a circulatory system is to transfer oxygen and nutrients to all the cells of the body, and take away the waste. • Don’t have a circulatory system; rely on maintaining a constant water flow through their bodies to obtain oxygen and to remove waste.

  10. RESPIATORY SYSTEM Porifera Cnidaria Same as porifera • Gases are exchanged with the environment through diffusion across individual cell membranes

  11. REPRODUCTION porifera cnidaria Sexual Asexual budding • Sexual • Internal, most sponges are hermaphrodites which gives them the ability to reproduce with any other sponge • Asexual • Budding- attach or separate from parent • Fragmentation- break off and become cold or dry and eventually become a new sponge

  12. HABITAT porifera cnidaria Fresh and salt water Reefs • Reef

More Related