Organ systems and evolution essay receive a lot of attention from natural scientists. Some of the organ systems and evolution essay subjects that have been greatly investigated are the evolutionally pathways for nervous system, excretory system, photoreceptors and the gametes. The evolution of these organs is derived through the use of evolution tree or by assuming a logical series that represents the order in which the organs evolved. Let’s use body cavity to demonstrate this concept of investigating organ system and their evolutionary paths. The evolution path begins with two branches; acoelomate which represents organisms without body cavity and pseodocoelomate. The use of tree diagram in writing organ systems essay is sometimes ineffective because mapping the evolutionary path of organs result in differing results. However, the use of tree diagram is critical in expressing thoughts on about organ system evolution. The tree is an effective tool for expressing the phylogenetic relation among organ systems of different organisms.
Majority of organ systems and evolution essay aims at explaining the diversity of species and the dynamics which enhance this diversity. In the process of describing organ system and evolution, it is recommended that some information on certain characteristics be presented in tables to enhance comparison. The study of organ system and evolution requires prioritizing on the extent of information to be explored since the subject is vast. In order to effectively present the metazoan evolution, phylum should be the units of consideration. The differences decrease from phylum down to species while similarities increase from phylum to species. Some of the taxa groups have a large number of species while some taxa consist of only one species.
Organ systems and Evolution essay example
Organic systems have been scientifically proven to have undergone rapid development process over the past two decades. Notably, organ systems do not appear or disappear suddenly during the course of evolution. These organs are composed of simpler structures, and in certain cases it is possible to trace physiological pathways and certain molecules as back as the pre-animal history. From the study of the organic system and evolution, animals are known to have combined both the ancestral and new elements to counteract the changing responses and the environmental requirements.
The evolution of the organ systems entails the study of the animal’s present phylogeny, the body organization, which includes skeletons, germ layers, segmentation, symmetry, dorsoventral axis, and anteroposterior axis (Hoehn & Marieb, 2006).
Arguably, various species of animals have had their organic systems undergo various transformations over time. Genetics prove that some animals had organs systems, which have since then demise due to disuse. For example, the early descendants of man, the homo habilis, had much stronger teeth than the modern man, which was used for cracking hard nuts and tearing the hunted flesh. Besides, they had hair all over the body to protect them from the harsh environments, which had since then disappeared as the modern man no longer lives on top of trees and caves that require the hairs protect the body.
The disease frequently is fatal and death occurs at the age of four .The disease arise when unsafe quantities of gangliosides build up in the brain nerve cells resulting in untimely death of the nerve cells. The TDS is an autosomal recessive disorder which results from genetic defect in a particular gene with one malfunctioning replica of that gene hereditary from each parent. Research has shown that the disease, named after Warren Tay (British ophthalmologist) and Bernard Sach (American neurologist) is caused by genetic mutation that occurs in the HEXA gene situated on chromosome 15.