1 / 10

Animal-like Protists: Protozoans 20-2

Animal-like Protists: Protozoans 20-2. Biology 1004 Flora. Protozoans. 4 Types: Zooflagellates Sarcodines Ciliates Sporozoans. Zooflagellates. Flagella – long whip-like projections that allow organisms to move

ania
Download Presentation

Animal-like Protists: Protozoans 20-2

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. Animal-like Protists: Protozoans20-2 Biology 1004 Flora

  2. Protozoans • 4 Types: • Zooflagellates • Sarcodines • Ciliates • Sporozoans

  3. Zooflagellates • Flagella – long whip-like projections that allow organisms to move • Zooflagellates – animal-like protists that swim using flagella and are classified into the phylum zoomastigina • Often referred to as zoomastigina • Can have 1 or 2 flagella • Reproduce asexually • Live in organisms and lakes/streams • Absorb food through cell membranes

  4. Sarcodines • Phylum Sarcodina • Move via cytoplasmic projections called “pseudopods” • These structures are temporary • Best known sarcodines are amoebas • Ex: blob • Cytoplasm flows into pseudopod allowing movement – called “amoeboid movement” • Obtain food through endocytosis and making a food vacuole • Reproduce through mitosis and cytokinesis • Live mainly in oceans

  5. Ciliates • Phylum Ciliophora • Movement provided via cilia – short hair-like projections • Ex: oars on a ship • Found in fresh and salt water • Free living – do not require other organisms

  6. Internal Anatomy of Ciliates • Cell membrane has trichocysts just below the surface • Bottle-shaped stiff projections used for defense • Contain two nuclei • Macronucleus – genetic info needed for daily existence • Micronucleus – contains “reserve” copies of all genes

  7. Ciliate Anatomy Cont. • Obtain food particles into the “gullet” • The gullet is an indentation of one side of the ciliate • Gullet forces food into the cell membrane and forms a food vacuole • Waste materials are excreted through an anal pore • Contractile vacuole allows cell to maintain homeostasis through absorption and removal of water • Reproduce through asexually • Can exchange genetic information through conjugation (sexual process)

  8. Ciliate Anatomy

  9. Sporozoans • Phylum Sporozoa • Do not move on their own and are parasitic • Reproduce via sporozoites • For humans, most protists cause diseases • Ex: malaria or african sleeping sickness • Darn females! Infects liver/RBC’s • Tetse Fly – damages nervous system • d

  10. Ecological Impact • Decomposers • Live symbiotically • Serve as food for other organisms • Ex: termites - trichonympha

More Related