Planarian lab report

planarian observation lab answers

I figured that these organs would take the longest to reproduce. Planaria are Hermaphrodites, which means that they have male and female gonads. Eventually, it will grow a midsection and a head. I predicted that the midsection would regenerate the fastest because it contains all the internal organs.

Planaria experiments

When the operation is complete, rinse the pieces of planarian into the petri dish with a stream of aged water from the dropper. Elliott, Kimberly C. It supports viewing of the video Identifying Key Genes in Regeneration. Repeat with the second cut. Whether regeneration is accomplished by pluripotent cells or by the collective activity of multiple lineage-restricted cell types is unknown. When a Planaria lays its eggs, they will be genetically diverse. Planarians are hermaphroditic, possessing complete male and female systems. Planaria are Hermaphrodites, which means that they have male and female gonads. This is possible because the Planaria have stem cells. It was difficult for us to cut the planaria because they were very quick and squirmy. Planaria reproduce asexually by a process called tail dropping or fragmentation. You might be asking what do you mean regeneration? Pluripotent cells in the embryo can generate all cell types, but lineage- restricted cells are generally thought to recharge adult tissues. Student Learning Targets Design and carry out an investigation.

In conclusion, planaria will regenerate when trisected and the mid section regenerated first. The stem cells can migrate to the wound or cut and repair it. Student teams then formulate a hypothesis regarding the regenerative ability of planarians.

Kept in captivity, they feed on raw liver.

Process of regeneration in planaria

Pluripotent cells in the embryo can generate all cell types, but lineage- restricted cells are generally thought to recharge adult tissues. They produce asexually by fragmentation and tail dropping in which they spontaneously drop their tails and each end regenerates the missing part. It will also be necessary to oxygenate the water by blowing bubbles in the water with the dropper. Student teams then formulate a hypothesis regarding the regenerative ability of planarians. We used ionizing radiation and single-cell transplantation to identify neoblasts that can form large descendant-cell colonies in vivo. For these reasons, I assume that my data was not completely valid. Planarians can reproduce a sexually though the process of regeneration. Regeneration is a special ability of the planarian, it allows them to make a clone of them selfs. Lab Procedure Choose two cuts from the eight operations given. Williams, Eric J.

Planarians have no definite eyes, just eyespots that cannot form an image and are sensitive to light.

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Planarian Regeneration by Lora Bueker