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Transcript of Animal-Like Protists
many are unicellular
some are mobile and some are not
the animal-like protists that can move either use tails called flagella, or with structures called cilia or pseudopodia
Have intracellular digestion
Obtain nutrients by absorbing the food through the cell membrane
Get nutrients by absorbing the food, surrounding the food, or engulfing the food with mouth pores
Food digests in food vacuoles
They are heterotrophs
They prey on bacteria and microfungi as predators
Protozoa consume 100 to 1000 bacteria per hour controlling the bacteria population
Protozoa communicate using hormones
Some nerves are present for this communication
Also use hormones to communicate with other organisms
they exchange air through their membrane
take in oxygen and release carbon dioxide
compartments that make this air transfer similar to lungs
The circulatory system is absent
The nutrients needed are absorbed through the cell membrane
Thrive in moist areas and some live in water (ponds, lakes, rivers)
Reproduce sexually and asexually
Sexually- conjuction where two protozoa exchange genetic material
Asexual- binary fission where a protozoa cell splits into two cells
Reproduction and Habitat
Nervous System, Respiratory, Circulatory, and Reproduction Systems of the Protozoa
Are usually unicellular that live in environments that include water
Others are found in moist areas
Unlike Plant-like Protists they do not have chloroplasts and chlorophyll
Known as Protozoa
Can be predators or parasites
Range between 10-52 micrometers
Pathogenic and Non-pathogenic
Pathogenic examples-Crypospordium causes Crytosporidiosis, Giardia lambdia can cause Giardiasis
Non-pathogenic examples- Chilommastix mesnii and Endolimax nana
Have been around for about 2 billion years
Over time they continue to become more complex
Becoming more mobile
5 question quiz
1. How do animal-like protists reproduce?
c. Both a and b
2. What makes them different from plant-like protists?
a. They can move around
b. They don't have chloroplasts
c. They reproduce sexually and asexually
3. Which of the following do not help animal-like protists move?
c. Hair on the cell
4. What is another name for an animal like protists?
5. How do these cells communicate with one another?