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Cells Presentation

Gurjot Bhella

on 2 August 2014

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Transcript of Euglena

The eyespot also known as the stigma is a heavily pigmented organelle that filters sunlight into light detecting structures at the base of the flagellum; allowing certain amounts of light to hit. The eyespot directs the Euglena towards sunlight. The eyespot is located near the flagellum, so it can control how the flagellum moves. When some proteins get hit by light the proteins build up molecules that tells the flagellum to move. The flagellum moves in the direction of sunlight. The eyespot allows cells to sense some light directions and the cells respond to it by swimming either towards the light or away from it. It helps cells find an environment for photosynthesis. It gathers enough sunlight to make food.
The Nucleus is the control centre for any cell. It directs all of the cells activities and also contains the chromosomes within itself.
A cell's genetic information, in the form of DNA, is stored inside the chromosomes within the Nucleus.
The Cell Membrane controls the movement of materials like nutrients and waste into and out of the cell.

The watery fluid found inside a cell is called a Cytoplasm. Within the Cytoplasm you would find the many Organelles present the cell. Also, chemical reactions take place here.
The Vacuoles inside a cell are used for storing water and nutrients. Plant cells tend to have larger Vacuoles than animal cells.
Chloroplasts is what allows a plant to produce food for itself. Chloroplasts contains many molecules of a green chemical called Chlorophyll, which allows a plant to make food. The process of making food is called Photosynthesis. Animal cells do not contain Chloroplasts.
The Euglena moves through the use of it's flagellum, a whip-like structure that acts like a tiny motor. The Flagellum is located on the front side of the Euglena. When the Flagellum moves the cell is projected forward. The Flagellum allows the Euglena to also move through water

The Mitochondria is an organelle that provides the cell with energy. It uses the process of respiration to do so. The energy provided from this small organelle is used to function almost every other function in the cell.
Ribosomes are the cells protein factories. Proteins are put together. These Proteins are very important for cell growth, repair,and reproduction.
A series of folded membrane, called Endoplasmic Reticulum (ER), carry material through the cytoplasm. An ER is sometimes "rough'', this is because there are ribosomes present upon it.
The Golgi Apparatus is where proteins are stored. It also puts the proteins into packages called Vesicles. Vesicles carry the protein molecules to the surface of the cell, where they are released outside.
Lysosomes patrol the Cytoplasm. They contain special proteins that are used to break down large molecules into smaller ones. The smaller molecules then will be reused. Lysosomes also exterminate any invading organism.
Contractile Vacuole is a unique looking vacuole found inside the Euglena. It stores excess water.
A Pellicle is a firm covering that surrounds the Cell Membrane. Unlike the Cell Wall, this covering is flexible.

The Euglena is a unicellular organism. It means that the organism has only one single cell in its body. It lives in freshwater like quiet puddles or ponds or even swimming pool. It belongs to the Kingdom Protista which also consists of other life forms such as amoeba and paramecium. Basically, it can be described as a type of protozoa with mixed characteristics of both plants and animals. It is similar plants because it can prepare its own food by photosynthesis. Its resemblance with animals with the fact that it can move around from one place to another, it can feed upon other smaller organisms and has a special feature called the Eye Spot that you will hear more on further on in the presentation.

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