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Case 3
Case 3

... Focally the lesion extends into the testis invading in between seminiferous tubules. Elsewhere the lesion shows central infarction. Discussion One of the keys to recognizing this entity is its paratesticular as opposed to intratesticular location. Relatively few entities involved the paratesticular ...
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Unicellular Organisms - hrsbstaff.ednet.ns.ca
Unicellular Organisms - hrsbstaff.ednet.ns.ca

... Bacteria (singular form is bacterium) are among the most primitive and also the most plentiful organisms on the planet. They are said to be very successful because they have survived and changed little over several billion years (Figure 2). Some, like plants, can make their own food. Others are para ...
Model 1 – Investigating Cell Size
Model 1 – Investigating Cell Size

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Golgi Body
Golgi Body

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Cell membranes - the Redhill Academy
Cell membranes - the Redhill Academy

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The Specificity of cell signaling
The Specificity of cell signaling

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Cell cycle



The cell cycle or cell-division cycle is the series of events that take place in a cell leading to its division and duplication (replication) that produces two daughter cells. In prokaryotes which lack a cell nucleus, the cell cycle occurs via a process termed binary fission. In cells with a nucleus, as in eukaryotes, the cell cycle can be divided into three periods: interphase, the mitotic (M) phase, and cytokinesis. During interphase, the cell grows, accumulating nutrients needed for mitosis, preparing it for cell division and duplicating its DNA. During the mitotic phase, the cell splits itself into two distinct daughter cells. During the final stage, cytokinesis, the new cell is completely divided. To ensure the proper division of the cell, there are control mechanisms known as cell cycle checkpoints.The cell-division cycle is a vital process by which a single-celled fertilized egg develops into a mature organism, as well as the process by which hair, skin, blood cells, and some internal organs are renewed. After cell division, each of the daughter cells begin the interphase of a new cycle. Although the various stages of interphase are not usually morphologically distinguishable, each phase of the cell cycle has a distinct set of specialized biochemical processes that prepare the cell for initiation of cell division.
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