MYOCARDIAL INFARCTION

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ANATOMY OF THE EYE

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Special senses  [ EYE] These are organs in the body that performs specialised functions. They contain sensory receptors which receives sensory impulses and pass them to the appropriate centers in the brain for interpretation.   ➡️ Types of Sensory Receptors - based on the type of stimuli they detect: 1. Mechanoreceptors - pressure receptors, stretch receptors, and specialized mechanoreceptors involved  in movement and balance.  2. Thermoreceptors - skin and viscera, respond to both external and internal temperature.  3. Pain receptors - stimulated by lack of O2, chemicals released from damaged cells and inflammatory  cells.  4. Chemoreceptors - detect changes in levels of O2, CO2, and H+ ions (pH) as well as chemicals that  stimulate taste and smell receptors  5. Photoreceptors - stimulated by light ➡️ Distribution of Receptors in the body: Special Senses • mediated by relatively complex sense organs of the head, innervated by cranial ...
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VENTRICLES OF THE BRAIN

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 The ventricular system is a set of communicating cavities within the brain. These structures are responsible for the production, transport and removal of cerebrospinal fluid, which bathes the central nervous system. FUNCTIONS OF CEREBROSPINAL FLUID  Cerebrospinal fluid is an ultrafiltrate of plasma that surrounds the brain and spinal cord. It serves three main functions : ➡️ Protection : acts as a cushion for the brain, limiting neural damage in cranial injuries. ➡️Buoyancy : by being immersed in CSF, the net weight of the brain is reduced to approximately 25 grams. This prevents excessive pressure on the base of the brain. ➡️Chemical stability : the CSF creates an environment to allow for proper functioning of the brain, e.g. maintaining low extracellular K+ for synaptic transmission. VENTRICLES OF THE BRAIN  The ventricles are structures that produce cerebrospinal fluid, and transport it around the cranial cavity. They are lined by ependymal cells, which fo...
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FLORENCE NIGHTINGALE

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Born: May 12, 1820 Florence, Italy Died: August 13, 1910 London, England English nurse The English nurse Florence Nightingale was the founder of modern nursing and made outstanding contributions to the knowledge and improvement of public health. EARLY YEARS AND STUDY  Florence Nightingale was born in Florence, Italy, on May 12, 1820; she was named after the city of her birth. Her father, William E. Nightingale , was a wealthy landowner who had inherited an estate in Derbyshire, England. Like many members of the wealthy class, he and Florence's mother, Fanny , dedicated themselves to the pursuit of active social lives. Florence and her sister, Parthenope , were tutored by their father in languages, mathematics, and history. Though Florence was tempted by the idea of a brilliant social life and marriage, she also wanted to achieve independence, importance in some field of activity, and obedience to God through service to society. In 1844 Nightingale decided that she want...
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