blood running backwards. The weight of blood in the vein is conciderable especially while standing still and the blood flow is against gravity. and blood is allowed to pool stretching the walls of the veins which damage the valves resulting in the lumen being unable to close. When the valve doesn’t close the almost static blood flows backwards and is allowed to pool in the vein. Over time this blood causes pressure to build in the vein and they become tortuous‚flabby‚ stretched and enlarged. Although
Premium Blood Immune system Heart
Root Operations and Approaches Tool Section 0 Alteration 0 Bypass Medical and Surgical Definition: Explanation: Examples: Definition: Explanation: 1 Examples: 2 3 4 Change Control Creation 5 Destruction 6 Detachment Dilation 7 8 9 B Division Drainage Excision Extirpation F G H Explanation: Examples: Definition: Explanation: Examples: Definition: Explanation: Examples: Definition: Explanation: Examples: Definition:
Premium Orthopedic surgery Radiation therapy
Akash G 12M 1.0 - Disease 1.1 Pathogens: Pathogens are disease causing microorganisms Disease is the symptoms displayed on a person following an infection‚ a malfunction of the body or mind Infectious Disease: Caused by bacterium‚ virus‚ fungum transferred from one person to another Non Infectious Disease: A disease that is not caused by a transmitted pathogen (e.g. Stroke‚ arthritis‚ obesity) Interface: A surface or boundary between two systems For a microorganism to be a pathogen‚ it
Premium Enzyme Cell membrane Protein
Name ____________________________ BIO 107 Chapter 13 – The Cardiovascular System 1) Where is the heart located? Within the mediastinum‚ bordered laterally by the lungs‚ posterio0rly by the vertebral column‚ anteriorly by the sternum. 2) Distinguish between the visceral pericardium and the parietal pericardium. Visceral is a membrane that covers the surface of the heart. Parietal is a membrane that forms the outter wall of the peritoneal cavity 3) Describe the layers of the heart wall.
Premium Heart Blood
PLASTIDS Plastids are large cytoplasmic organelles. Plastids are major organelles found in the cells of plants and algae. Plastids are the site of manufacture and storage of important chemical compounds used by the cell. Plastids often contain pigments used in photosynthesis‚ and the types of pigments present can change or determine the cell’s colour. The term plastid was derived from the Greek word plastikas meaning formed or moulded. This term was coined by Schimper in 1885. In plants
Free Photosynthesis Cellular respiration Adenosine triphosphate
Light I | | INTRODUCTION | Light‚ form of energy visible to the human eye that is radiated by moving charged particles. Light from the Sun provides the energy needed for plant growth. Plants convert the energy in sunlight into storable chemical form through a process called photosynthesis. Petroleum‚ coal‚ and natural gas are the remains of plants that lived millions of years ago‚ and the energy these fuels release when they burn is the chemical energy converted from sunlight. When animals digest
Premium Light Electromagnetic radiation
Digestion In Small Intestine While digestion continues in the small intestine‚ it also becomes a major site for the process of absorption‚ that is‚ the passage of digested food into the bloodstream‚ and its transport to the rest of the body. - The small intestine is a long‚ narrow tube‚ about 20 ft (6 m) long‚ running from the stomach to the large intestine. - The small intestine occupies the area of the abdomen between the diaphragm and hips‚ and is greatly coiled and twisted. - The small
Free Digestion Small intestine Digestive system
where 2 water molecules break down into 4 H+ ions‚ 1 oxygen molecule‚ and 4 electrons. These excited electrons are transferred through the electron transfer chain to provide energy to reduce NADP+ to NADPH and H+ ions are pumped into the thylakoid lumen. These H+ ions create a concentration gradient which is used to pump back H+ ions into the stoma to regenerate ATP. The next process is called the carbon fixation. Carbon dioxide is reduced to form two 3-carbon sugar phosphate molecules which turns
Free Photosynthesis Adenosine triphosphate Cellular respiration
the submucosa‚ the muscularis externa‚ and either a serosa or adventitia. Each of these layers has a predominant tissue type and a specific function in the digestive process. The mucosa is the wet epithelial membrane abutting the alimentary canal lumen. The major functions of the mucosa are secretion‚ absorption of digested foodstuffs‚ and protection. The submucosa’s major function is nutrition and protection. The muscularis externa is the major regulator of GI mobility. The serosa functions to reduce
Free Digestion Digestive system
may be the cause of retained concentrated bile which is a very unpleasant substance. In the occurrence of extended fasting‚ the gallbladder never obtains a cholecystokinin (CCK) stimulus to empty; thus‚ the concentrated bile remains immobile in the lumen. Cholecystitis regularly shows as a pain in the right upper quadrant. The gallbladder may possibly be tender and distended. Pain is in the beginning intermittent‚ but then it presents as constant and severe. The pain may be referred pain that is
Premium Hepatology Pain Suffering