Kingdom Animalia Presentations Flashcards
Phylum Coelenterata:
Hollow-intestine animal
Phylum Cnidaria
Stinging-celled animals
What are some characteristics of phylum cnidaria?
- Two stages: sessile polyps and free medusae
- Radial symmetry
- Solitary or colonial
- No definite head, heart, or brian
- Tissue level of organization
- Decentralized nerve net
- Gastrovascular cavity: single opening for mouth and anus
- No excretory or respiratory system
- 2 layers: Epidermis and gastrodermis with mesoglea (jelly-like layer) in between
- Nematocysts: Stinging cell organoids on tentacles
- Moves by contracting muscle fibers
What type of environment do Phylum Cnidaria live in?
All aquatic (some are found in fresh water, but most are marine)
What are some common representatives of Phylum Cnidaria?
jellyfish
sea anemones
coral
What is the life cycle of Phylum Cnidaria?
- Asexual reproduction by budding (POLYPS)
2. Sexual reproduction by gametes (MEDUSAE)
What is the importance to humans with Phylum Cnidaria?
- Corals used for ornamental purposes (jewelry)
- Corals important for building coral reefs and islands
- Dangerous to humans because of stinging
What is the complexity of Phylum Cnidaria?
Relatively simple
What is the nearest relative to Phylum Cnidaria?
Sponges
What is the classification of Phylum Cnidaria?
- Hydrozoa: Hydra (freshwater) MAN O’ WAR (can’t decide where to go… floats in the water like a buoy. have long, tall, skinny polyps)
- Scyphozoa: Jellyfish (free-living medusa)
- Anthozoa: Sea anemone and corals (both short, squat polyps)
Cnide-
Nettle
-Aria
like/connected with
Coel-
Hollow/bad
-enter
intestine/gut
What is the difference between medusa and polyps?
Medusa is free-living and polyps is sessile
Plat-
flat
-helminth
worm
What are characteristics of Phylum Platyhelminthes?
- Single-celled
- Turbellaria level of organization
- Can live alone or in colonies
- Most are parasitic, but some can be free-living
- Systems are simple because of diffusion
- Acoelomates: meaning they have no body cavity
- Soft bodied
- Invertebrates
- Can regrow from one single cell
- Can jump from host to host quickly
- Bilateral symmetry
- Movement is through nerves and muscle control
What type of environment does Phylum Platyhelminthes live in?
Parasitic tapeworms live in the host
Free-living tapeworms can live aquatically or terrestrial
What are some common representatives of Phylum Platyhelminthes?
Planarian
Tapeworm
Fluke
What is the life cycle of Phylum Platyhelminthes?
Planarian- cross fertilization (sexually)
Tapeworm- sexually through self fertilization
All can reproduce asexually through dissection
What is the importance to humans with Phylum Platyhelminthes?
- Tapeworms can be very harmful to humans with some leading to having epilepsy for the rest of the host life. Tapeworms live in the digestive system and eat all the food and fatty substances. Dogs and other animals can get tapeworms too.
- In Hawaii, some have been used to cut down on a species of snail that was taking over the island.
What is the complexity of Phylum Platyhelminthes?
Simple
What is the nearest relative to Phylum Platyhelminthes?
Monogenea
Phylum Platyhelminthes is the first group in Animalia to have what?
organs and tissues
What do Planaria have?
eye spots
Where do tapeworms live?
In the digestive system and they have no digestive system
What are the first 3 systems we see showing up?
nervous system
digestive system
muscle system
Flatworms are all what?
hermathrodites