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Cooperation between Species

By On May 16, 2011 · Leave a Comment

There are many examples of cooperation between species, however, one of the better examples is the relationship observed between marine ‘cleaner’ fish and their ‘clients’. There are many species of cleaner fish such as the wrasse from the genus Labroides, or the gobies from the genus Elacatinus.

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Comparative Nitrogen Excretion

By On May 15, 2010 · Leave a Comment

Introduction

In animals all waste products must be excreted from the body in some manner. The urinary system is involved in the excretion of nitrogenous waste products such as urea, uric acid or ammonia. The excretion of nitrogenous waste from animals is important because if it is allowed to build up, it can [...]

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Comparative Digestion

By On May 14, 2010 · 2 Comments

Introduction

The method of digestion which an animal uses depends on its diet i.e. carnivore, herbivore or omnivore. For example not all mammals are carnivores (e.g. dogs and cats), herbivorous mammals include rabbits, chinchillas, guinea pigs etc.

Generally, carnivores consume animal tissue which is similar to their own; therefore all the body needs to do [...]

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Special Senses – Taste

By On May 5, 2010 · Leave a Comment

Introduction This is part of the ‘Special Senses’ Series:

Vision Hearing Smell Taste The tongue is the organ of taste. Perception of taste is also known as gustation and in a similar manner to smell it depends on chemoreceptors to detect [...]

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Special Senses – Hearing

By On May 4, 2010 · 2 Comments

Introduction This is part of the ‘Special Senses’ Series:

Vision Hearing Smell Taste The ear is the organ of hearing (and balance). Specially adapted receptor cells located in the inner ear are able to react to sound waves. The ear can be divided into [...]

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Comparative Animal Respiration

By On February 28, 2010 · 1 Comment

Respiration is the process of obtaining sufficient oxygen from an organism’s environment to support its cellular metabolic requirements. Respiration is not just the mechanical process of breathing – the transport of oxygen from the outside air to the cells within tissues, and the transport of carbon dioxide in the opposite direction. It is also the metabolic process by which an organism obtains energy by reacting oxygen with glucose to give water, carbon dioxide and ATP (energy).

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