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Showing posts with the label Physiology

RSV Infection Across All Ages: Symptoms, Risks, and Prevention

By Sam
Respiratory Syncytial Virus (RSV) Everything you need to know about symptoms, prevention, and treatment of this common respiratory virus. Dr. Sarah Chen, MD What is RSV? Symptoms Transmission Diagnosis Treatment Prevention High-Risk Groups FAQ What is Respiratory Syncytial Virus (RSV)? Respiratory Syncytial Virus (RSV) is a common respiratory virus that usually causes mild, cold-like symptoms but can be serious for infants and older adults. ...
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INTRODUCTION TO HUMAN ANATOMY& PHYSIOLOGY Bmlt Dmlt 1year

By Sam
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 DEFINATION Human Anatomy: It is the branch of science that studies the physical structure of human body. • Physiology: It is the branch of biology that deals with the internal working of living things, including functions such as metabolism, respiration and reproduction. STRUCTURAL ORGANIZATION All multicellular organisms are organized at different levels, starting with the cell and ending with the entire organism. LEVELS OF STRUCTURAL ORGANIZATION • There are six levels of organization (from smallest to largest) 1. The chemical level 2. The cellular level 3. The tissue level 4. The organ level 5. The organ system level 6. The organism level SYSTEMS OF THE HUMAN BODY • There are 11 systems of the human body 1. Integumentary system (hairs, nails, sweat glands, oil glands) 2. Skeletal system 3. Muscular system 4. Endocrine system 5. Cardiovascular system 6. Lymphatic system 7. Respiratory system 8. Digestive system 9. Nervous system 10. Urinary system 11. Reproductive system BAS...
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THE RESPIRATORY SYSTEM ANATOMY AND PHYSIOLOGY BMLT

By Sam
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 WHAT IS RESPIRATORY SYSTEM? BMLT The respiratory system (also respiratory apparatus, ventilatory system) is a biological system, consisting of specific organs and structures used for gas exchange in human. Organs of Respiratory System: Nose and nasal cavity. Pharynx Larynx Trachea Two bronchi Bronchioles Two Lungs NOSE AND NASAL CAVITY POSITION AND STRUCTURE Main route of air entry. Two cavities divided by a SEPTUM. Anteriorly consist hyaline cartilage. The roof is formed by ethmoid bone The floor is formed by roof of the mouth. The medial wall formed by the septum. The lateral wall formed by the maxilla. RESPIRATORY FUNCTIONS OF THE NOSE The first of the respiratory passages. Warming- Due to the immense vascularity of the mucosa. Filtering and cleaning- This occurs due to hairs which trap larger particles. Humidification - As air travels over the moist mucosa,it becomes saturated with water vapour. PHARYNX What is pharynx? The pharynx is the part of the throat that is ...
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Digestive system Mouth pancreas BMLT

By Sam
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WHAT IS THE DIGESTIVE SYSTEM? BMLT The gastrointestinal tract (digestive  tract, digestional tract, GI tract, GIT, gut,or alimentary canal) is an organ system within  humans and other animals which takes in food, digests it and absorb energy and nutrients, and  expels the remaining waste as feces. The major organs of the digestive system: Mouth. Pharynx. Esophagus. Stomach. Small Intestine. Large Intestine. Rectum Accessory digestive organs: liver gallbladder pancreas. Salivary gland Functions of GI tract Ingestion : taking of food into the alimentary tract. i.e. eating & drinking. Propulsion :mixes & moves the contents along the alimentary tract. Digestion :consist of: Mechanical breakdown of food e.g. mastication (chewing) Chemical digestion of food into small molecules by enzymes. Absorption: this is the process by which digested food substances pass through the walls of some organs of the walls of some organs of the alimentary canal into the blood for...
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What is cardiovascular system BMLT

By Sam
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 Cardiovascular System BMLT The cardiovascular system has three types of blood vessels: Arteries (and arterioles) – carry blood away from the heart Capillaries – where nutrient and gas exchange occur Veins (and venules) – carry blood toward the heart. Blood Vessels The Arteries Arteries and arterioles take blood away from the heart. The largest artery is the aorta. The middle layer of an artery wall consists of smooth muscle that can constrict to regulate blood flow and blood pressure. Arterioles can constrict or dilate, changing blood pressure. The Capillaries Capillaries have walls only one cell thick to allow exchange of gases and nutrients with tissue fluid. Capillary beds are present in all regions of the body but not all capillary beds are open at the same time. Contraction of a sphincter muscle closes off a bed and blood can flow through an arteriovenous shunt that bypasses the capillary bed. Anatomy of a capillary bed Anatomy of a capillary The Veins Venules...
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Liver anatomy and physiology

By Sam
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 Liver  Introduction The liver is the largest of the abdominal viscera, occupying a substantial portion of the upper abdominal cavity. It performs a wide range of metabolic activities necessary for homeostasis, nutrition and immune defence. It is composed largely of epithelial cells (hepatocytes), which are bathed in blood derived from the hepatic portal veins and hepatic arteries. Hepatocytes are also associated with an extensive system of minute canals, which form the biliary system into which products are secreted. The liver lies in the upper right part of the abdominal cavity. It occupies most of the right hypochondrium and epigastrium, frequently extends into the left hypochondrium as far as the left lateral line. In adults the liver weighs 2% of body mass. an overall wedge shape The liver capsule plays an important part in maintaining the integrity of its shape. Once the capsule is lacerated, the liver tissue is easily parted and provides only imited support for surgical...
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urinary bladder Anatomy Physiology

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  Urinary Bladder   The urinary bladder is a transitory stockpiling repository for pee. It is situated in the pelvic hole, back to the symphysis pubis, and beneath the parietal peritoneum. The size and state of the urinary bladder fluctuates with the measure of pee it contains and with the pressing factor it gets from encompassing organs.  The inward covering of the urinary bladder is a mucous layer of momentary epithelium that is constant with that in the ureters. At the point when the bladder is vacant, the mucosa has various folds called rugae. The rugae and temporary epithelium permit the bladder to grow as it fills.  The second layer in the dividers is the submucosa, which upholds the mucous film. It is made out of connective tissue with versatile strands.  The following layer is the muscularis, which is made out of smooth muscle. The smooth muscle strands are joined every which way and, altogether, these are known as the detrusor muscle. Constriction of th...
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