Structure and Function in Four Cells Biology Essay

Structure and Function in Four Cells Biology Essay The human body consists of multiple cells that share a common structure while performing different functions. The structure of cells is complex shelled by plasma membrane, which function is to protect the cell from unflavoured entries. Under the shell, the cell is surrounded by cytoplasm, the jelly like nature of which may transform into a grainy substance because of the contained organelles (Levy 43). The largest organelle is the nucleus comprises DNA-carrying chromosomes that shape the function and performance of each cell. The DNA-rich nucleolus within the nucleus is responsible for the development of ribosomal protein and formation of ribosomes. Ribosomes packaged in the nucleus cover endoplasmic reticulum located outside the nucleus and having a rough surface. The core function of the ribosomes is to produce protein and enforce protein synthesis through translating mRNA-carried instructions. Ribosomes-free endoplasmic reticulum regarded as smooth serve to produce lipids and steroid. Lipids are further combined and processes with protein to make surface membrane for the cell’s secretion or lysosomes. The formed lysosomes are responsible for detecting and destroying impaired cells or organelles and bacteria cells by the power of hydrolytic enzymes contained within them (Olson 284). Mitochondria complements the sophisticated cell structure and facilitates aerobic respiration and synthesis at later stages to provide the cell with a chemical energy. The human body is made of multiple cells that contain 23 pairs of chromosomes. The total of cells in an individual body is unknown, as each organism comprises both identifiable and individual cells. Identifiable cells work together to enable the proper function of the organism, which signifies the importance of each cells for the body in terms of existence and sufficiency (Bianconi et al. 463). However, scholars distinguish specialised cells that are accountable for the critical functions in the multi-cellular human organism. There are four types of specialised cells carrying out specific roles and features. In brief, red blood cells perform the function of oxygen carriage. In this respect, they are characterised by a large surface area to allow oxygen to pass through them. In addition, red blood cells contain haemoglobin that joins oxygen in the transfer across the organism (Porth 279). Red blood cells lack the nucleus, which equips them with enough room for carrying out oxygen that is fundamental for the function of any human bodily part and organ. These cells are flexible to go through narrow blood vessels and ensure successful blood circulation in the body. Another type of specialised cells is nerve cells that are responsible for the function of producing and delivering nerve impulses to various body parts. In other words, nurse cells serve to synthesise the overall number of cells and functions occurred within the body. Hence, nerve cells are long to connect within distinct body parts with branching parts at each end. These long-distance connections pass electrical signals that enable the well-formed coherent interaction between different cells (Walker 32). Two other types of specialised cells are dedicated to the reproductive function of the human organism and differ in terms of female and male reproductive cells. The female reproductive cell referred to as egg cell serves to unite with the male cell to form and nourish a new cell. As such, egg cell is large and made of cytoplasm. In its turn, male reproductive cell titled as sperm cell is to reach egg cell and join with it. In this respect, sperm cell has a head used to enter the fem ale cell and a long tail enabling its long-distance and fast swimming (Walker 32). While performing its crucial function of fertilisation, male reproductive cell embeds generic information into a newly formed cell and provides it with the required chemicals for further development. Works Cited Bianconi, Eva, et al. “The Estimation of the Number of Cells in the Human Body.” Annals of Human Biology, vol. 40, no. 6, pp. 463-471. Levy, Leia D. C. “Principles of Pathology.” Principles and Practice of Radiation Therapy, edited by Charles M. Washington, Elsevier Health Sciences, 2015, pp. 42-57. Print. Olson, J. L. “Diagnostic Electron Microscopy.” Essentials of Anatomic Pathology, edited by Liang Cheng and David G. Bostwick, Springer, 2016, pp. 269-290. Print. Porth, Carol. Essentials of Pathophysiology: Concepts of Altered Health States. Lippincott Williams Wilkins, 2011. Print. Walker, Denise. Cells and Life Processes. Evans Brothers, 2009. Print.