Human Anatomy & Physiology

The Eye

The Eye The eye is the visual organ. It resides in the orbital cavity and is supplied by the optic nerve (the second cranial nerve). It is a sensory unit composed of three parts: receptor, sensory pathway, and a brain center. ·         It is spherical structure situated in the orbital cavity ·         It is about 2.5 …

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THE NERVOUS SYSTEM

THE NERVOUS SYSTEM ·         The nervous system detects and responds to change inside and outside the body. ·         It controls many vital aspects of body function and maintain homeostasis.  ·         The nervous system has three main function. 1.      Sensory 2.      Integration 3.      Motor  Classification  ·         The nervous system consists of neurons, which conduct nerve impulses …

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THE CARDIOVASCULAR SYSTEM

The cardiovascular system ·         The cardiovascular represents “Cardio” means Heart; to ensure constant circulation of blood and “Vascular” means Blood Vessel; through which the blood flows. ·         The heart is pumped by two circulation systems; 1.      The pulmonary circulation   2.      The systemic circulation  Fig. 02: Blood circulation  The heart and Homeostasis ·         The heart …

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