Essay on cells of the human body

Some cells are complete organisms, such as the unicellular bacteria and protozoa; others, such as nerve, liver, and muscle cells, are specialized components of multi-cellular organisms.

Essay on cells of the human body

Homeostasis in the Human Body Essay - Paper Example Homeostasis in the Human Body Essay Homeostasis in the Human Body Homeostasis is the maintenance of a stable internal environment within tolerance limits, this is the restricted range of conditions where cellular operations effectively work at a consistent rate and maintain life - Homeostasis in the Human Body Essay introduction.

These conditions include temperature, blood glucose levels, pupil diameter control and many more. The body is made up of many cells. Many specialized cells group up to form a tissue. Tissues group up to form organs, these organs can then connect to form the digestive system.

The body is therefore made up of many specialized systems. In general, the combined activities of the specialized systems provide the optimum environment for individual cells.

This means the preservation of a constant composition of the fluid that bathes the body cell, tissue fluid. This situation is for health and is called homeostasis. Homeostasis adjusts to the changing external environment, e.

Hormones and the nervous system achieve this. The body has particular features such as the skin and circulatory system, which helps its survival against the environment.

Early Ideas in Embryology

The metabolism is able to adjust to internal and external changes that occur. Homeostasis is so important that most disease is regarded as a result of its disturbance, a condition called homeostatic imbalance. As a result we are more vulnerable to illnesses and they produce the changes we associate with ageing.

Homeostatic imbalance takes place when the usual negative feedback mechanisms are overwhelmed and the destructive positive feedback mechanisms take over. An example of this phenomenon is heart failure. Illnesses such as hypertension, diabetes are all a result of failed homeostatic mechanisms; this demonstrates the importance of homeostasis to an individual.

Homeostasis is important to the human body, it helps us keep our body regulated and healthy to keep us alive.

Human blood volume

Choose Type of service.In this essay I will be looking at the human body and how it is organised, from the simple cell to how the body systems co-operate with each other and that everything functions properly.

Firstly I will be looking at some simple cells that will group together to make up a . The volume of blood in a person's body will vary according to their size and other factors, but the average quantities of blood are as follows.

Essay on cells of the human body

Published: Mon, 04 Jun In this essay I will be looking at the human body and how it is organised, from the simple cell to how the body systems co-operate . click here Energy and Human Evolution by David Price.


Please address correspondence to Dr. Price, Carpenter Hall, Cornell University, Ithaca, NY Smaller than 10 − (one googolth). Mathematics – Numbers: The number zero is a natural, even number which quantifies a count or an amount of null size. Mathematics – Writing: Approximately 10 −, is a rough first estimate of the probability that a monkey, placed in front of a typewriter, will perfectly type out William Shakespeare's play Hamlet on its first try.

Early Ideas in Embryology Prior to the mids, scientists believed that development was the result of preformation. Preformation means that animals develop from an already existing miniature animal that merely required the right conditions to unfold and grow into a new organism.

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