Respiration‚ digestion and rocks Respiration Respiration is a chemical reaction that happens in all living cells. It is the way that energy is released from glucose‚ for our cells to use to keep us functioning. Remember that respiration is not the same as breathing (which is properly called ventilation). The glucose and oxygen react together in the cells to produce carbon dioxide and water. The reaction is called aerobic respiration because oxygen from the air is needed for it to work. Digestion
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blood spaces • Sinuses • Blood in direct contact with tissues • Returns to heart via open veins • No control 3 Circulation in vertebrates 4 Double circulation • Blood moves through heart 2x during a circuit – Lungs – Body – Low pressure from lungs‚ • Birds • Warm blooded creatures • High metabolic rate – Requires good oxygen supply → aerobic respiration • 5 Human cardiovascular system • Human cardiovascular system blood flows • Muscular heart → arteries → smaller
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Digestion is the complex process of turning the food you eat into the energy you need to survive. The digestion process also involves creating waste to be eliminated. The digestive tract (or gut) is a long twisting tube that starts at the mouth and ends at the anus. It is made up of a series of by muscles that coordinate the movement of food and other cells that produce enzymes and hormones to aid in the breakdown of food. Along the way are three other organs that are needed for digestion: the liver
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build and nourish cells; and to provide energy. Food travels though the digestive tract by muscle contraction called peristalsis. This journey of digestion can take up to twenty four hours. Digestion begins in the mouth where the teeth break food down into smaller particles during mastication. Salivary glands secrete saliva which begins chemical digestion and keeps the food moist. Swallowed food is pushed into the pharynx by the contraction of multiple muscle of the face‚ neck and tongue. The soft
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Kevin Kabuga BIO 160 10/28/14 Adult vs. Fetal Circulation CRN 93954 Prof. Kifle In adult circulation sequence‚ non-oxygenated blood enters the right atrium via the inferior and superior vena cava. The increase level of blood in the right atrium causes the tricuspid valve to open and drain the blood to the right ventricle. Pressure of blood in the right ventricle causes the pulmonic valve to open and non-oxygenated blood is directed to the pulmonary artery then to the lungs. The exchange of
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Tema 16. Coronary Circulation Comisión Papanicolaou Unit 16. Coronary Circulation 1. Morfofunctional
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DIGESTION OF CARBOHYDRATES Digestion of carbohydrate begins in the mouth‚ with the secretion of the enzyme salivary amylase from the serous cells of the salivary gland. This enzyme breaks starch and glycogen into disaccharides. The mucous cells of the salivary gland secrete a mucus‚ which causes the food to stick together‚ and acts as a lubricant to aid in swallowing. The salivary glands are grouped into three categories: the parotid gland‚ submandibular glands‚ and sublingual‚ all located
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include the teeth‚ tongue‚ salivary glands‚ liver‚ gallbladder‚ and pancreas. To achieve the goal of providing energy and nutrients to the body‚ six major functions take place in the digestive system ingestion‚ Secretion‚ mixing and movement‚ digestion‚ absorption and excretion. There are two kinds of organs that make up the digestive tract are the mouth‚ esophagus‚ stomach‚ small intestine‚ large intestine also called the colon - rectum‚ and anus all of which are hollow. Inside these hollow
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body. You might find yourself asking‚ what does blood have to do with digestion‚ respiration and circulation? Hopefully‚ after the presentation all of your questions will be answered. When a person thinks of digestion they usually think about what happens in the stomach. A lot has happened to digest the food way before it gets to the stomach. It starts in the mouth or oral cavity. It is a process called mechanical digestion. First‚ Mastication begins. Mastication is the chewing of the food
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metabolized in the body! Digestion is the chemical breakdown of food molecules into smaller molecules that can be used by various cells within the body. The breakdown is initiated when food is ingested in the mouth and specific enzymes are exposed to components within the food molecules. Digestion begins in the mouth with mastication‚ or chewing‚ performed by the teeth. The purpose of chewing is to grant the food more exposure to enzymes‚ therefore allowing chemical digestion to occur faster. The presence
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