NERVOUS SYSTEM KONTAXAKIS ANTONIOS (27336) TRIANTAFILLOU EVANGELIA FEDRA (27363)

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Presentation transcript:

NERVOUS SYSTEM KONTAXAKIS ANTONIOS (27336) TRIANTAFILLOU EVANGELIA FEDRA (27363)

INTRODUCTION n Coordination of our body system is achieved through our nervous system, a long leap forward in a millions of years evolution battle.

Cellular level n The nervous system is based on the interconnection of neurons, each sending and receiving nerve impulses.

Receptors n Stimuli are received through special mechanisms, receptor organs such as chemo-or thermoreceptor. (Meissner’s tactile or end buld of Krause)

SENSORY ORGANS Our sensory organs are: 4 the ear 4 the eye 4 the nose(nasal passages) 4 the tongue 4 skin&hairs&nails

1. Ear: an organ for hearing and balance 2. Eye: an organ of sight.

3.The tongue: a strong muscle at the floor of the mouth that is covered by the lingual membrane. It is the organ of taste. 4.Skin: It consists of 3 layers: a)the epidermis b) the dermis c) the subcutis. The nails are a form of skin and it is formed by keratin. 5.The nose(nasal passages): an organ of smell.

Pathway till command centres n Peripheral nervous system is then assigned to carry info till our brain or spinal cord.

Command Centres n Brain interneurons and spinal cord reflex arcs are assigned to decode stimuli value and decide action.

Reflex

Brain parts n Our brain comprises of –the cerebrum responsible for most of brain information processing –the brain stem dealing with involuntary functions of vital importance –the cerebellum offering balance and equilibrium as well as memory of repetitive acts

The Brain

Action n Motor neurons carry the final command till the neuroglandular or neuromuscular junction where action takes place.

Diseases of nervous system n Epilepsy: a disorder in which nerve cells of the brain, from time to time, release abnormal electrical impulses. n Brain tumors n Lyme disease: a bacterial illness that is transmitted to humans by the bite of deer tick.

What can we do to maintain a healthy nervous system? Well balanced diet Regular exercise Stress management Pharmacist’s Supplement Recommendation  Vitamins and Minerals  Antioxidants  Essential Fatty Acids  Amino Acids  Herbs and Phytonutrients

Strengths and weaknesses n rapid and effective info processing n culture –language –science –ethics –adaptability n conciousness n Pain n inability to renew n drug addiction n certain spectrum of sound+radiation frequency + -