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Anatomy and Physiology-Cells Essay

  • Submitted by: jessica45
  • on October 5, 2012
  • Category: College Admissions
  • Length: 1,630 words

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Below is an essay on "Anatomy and Physiology-Cells" from Anti Essays, your source for research papers, essays, and term paper examples.

P1 Assignment.                              
Organisation of the body-Cells.
In the human body the smallest function are cells, they are too small to be seen without magnification (Bailey.R 2012). There are more than a trillion cells that make up the human body (Class notes 2012). The two main cells in the human body are Eukaryotic and Prokaryotic (Bailey.R 2012).
The main cell components that will be outlined in this assignment are:
  1. Nucleus
  2. Nuclear Membrane
  3. Mitochondria
  4. Lysosomes
  5. Golgi Apparatus
  6. Cell Membrane
  7. Ribosomes
  8. Cytoplasm
  9. Endoplasmic Reticulum

Nucleus
The nucleus is an organelle. The key structure of the nucleus is that it contains deoxyribonucleic acid (DNA). These consist of chromosomes which are “surrounded by a nuclear envelope containing pores” (Geatrell.B, Hocking.S and Wakefield.J 2009). The function of the nucleus is that it carries genetic information known as genes on the deoxyribonucleic acid (DNA) code. These determine different characteristics of the individual. It also controls the activities of the cell (Geatrell.B, Hocking.S and Wakefield.J 2009).
Nuclear Membrane
The nuclear membrane is made up of the two layers, it encloses DNA and other genetic materials in a eukaryotic cell, and this is where it gets its name from (Pandey.k 2011). The nucleoplasm gets separated from the cytoplasm due to it having a double-layered membrane.
The function of the nuclear membrane is to direct movement in and out of only certain substances. The membranes ‘mitosis’ and ‘meiosis’ help control the movement and transport between the nucleus and cytoplasm (Pandey.k 2011), this is also known as compartmentalizing. Another function would be the communication between the nucleus and the rest of the cell.
Mitochondria
Respiration and energy production is controlled by mitochondria (Hall D 2005). Cells need to move and divide and mitochondria provides energy for them to do so. The outside of...

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