Презентация К уроку английского языка "The Alimentary tract" - скачать онлайн

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  • Тип файла:
    ppt / pptx (powerpoint)
  • Всего слайдов:
    29 слайдов
  • Для класса:
    1,2,3,4,5,6,7,8,9,10,11
  • Размер файла:
    4.12 MB
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    172
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  • Автор:
    неизвестен


Слайды и текст к этой презентации:

№1 слайд
Содержание слайда:
№2 слайд
The Alimentary Tract A long
Содержание слайда: The Alimentary Tract A long muscular tube with many sections and areas. Begins with the mouth and ends with the anus.
№3 слайд
The Alimentary tract Mouth
Содержание слайда: The Alimentary tract Mouth Pharynx Esophagus Stomach Small Intestine Large Intestine Anus
№4 слайд
Accessory Parts Organs that
Содержание слайда: Accessory Parts Organs that are not in the Alimentary tract but helps in the digestion Teeth Tongue Salivary glands Liver Gall bladder Pancreas
№5 слайд
Mouth Functions Food enters
Содержание слайда: Mouth Functions: Food enters in the mouth or oral cavity Tasting Mechanical breakdown of food Secretion of salivary glands (salivary amylase)
№6 слайд
Mouth Structures in the mouth
Содержание слайда: Mouth Structures in the mouth that aids digestion: Teeth – cut, tear, crush and grind food. Salivary glands – produce and secrete saliva into the oral cavity. Parotid (beneath the cheeks) Submaxillary (below the jaw bone) Sublingual (below the tongue) – saliva moistens the food and contains enzymes (ptyalin or salivary amylase) that begins digestion of starch into smaller polysaccharides.
№7 слайд
Mouth Tongue Mixes and rolls
Содержание слайда: Mouth Tongue Mixes and rolls food into tiny mashed up bits (Bolus) Pushes the bolus toward the pharynx and into the esophagus when swallowing.
№8 слайд
Anatomy of the Mouth and
Содержание слайда: Anatomy of the Mouth and Throat
№9 слайд
Human Deciduous and Permanent
Содержание слайда: Human Deciduous and Permanent Teeth
№10 слайд
Mechanism of Swallowing
Содержание слайда: Mechanism of Swallowing Swallowing is a coordinated activity of the tongue, soft palate, pharynx and esophagus. Phases Food is pushed into the pharynx by the tongue. (voluntary) Tongue blocks the mouth Soft palate closes off the nose Larynx (Adam’s Apple) rises so the Epiglottis (a flap of tissue) can close the opening of the trachea.
№11 слайд
Содержание слайда:
№12 слайд
Esophagus A straight muscular
Содержание слайда: Esophagus A straight muscular tube that is about 10 inches (25 cm) long which connects the mouth with the stomach Food takes about 4 to 8 seconds as it passes through to the stomach. Its walls contain smooth muscles that contracts in wavy motion (Peristalsis). Peristalsis propels food and liquid slowly down the esophagus into the stomach. Cardiac Sphincter (ring-like valve) relaxes to allow food into the stomach.
№13 слайд
Peristalsis
Содержание слайда: Peristalsis
№14 слайд
Stomach J-shaped muscular sac
Содержание слайда: Stomach J-shaped muscular sac Has inner folds (rugae) that increases the surface area of the stomach. Churns and grinds together the bolus into smaller pieces. Food is mixed with gastric juices (hydrochloric acid and enzymes) secreted by the stomach walls. HCL helps break down food and kills bacteria that came along with the food.
№15 слайд
Stomach
Содержание слайда: Stomach
№16 слайд
Stomach Pepsin major enzyme
Содержание слайда: Stomach Pepsin – major enzyme; converts proteins into peptides in the presence of HCL. Mucus – lubricates food and protects the gastric lining from strong digestive juices. Converts the bolus into a liquid (chyme) after 4 hrs of mechanical and chemical digestion Chyme passes through the pyloric sphincter into the small intestine.
№17 слайд
Movements in Stomach
Содержание слайда: Movements in Stomach
№18 слайд
Small Intestine Long ft ,
Содержание слайда: Small Intestine Long (20 ft), coiled tube beneath the stomach. Has three parts: Duodenum – upper part; about 10 in; connected to the stomach. – where the digestive juices from the pancreas and the liver combine with chyme making it thin and watery. Jejunum – about 8 ft Ileum – about 12 ft
№19 слайд
Small Intestine Site of
Содержание слайда: Small Intestine Site of greatest amount of digestion and absorption
№20 слайд
Small Intestine Takes about
Содержание слайда: Small Intestine Takes about 4 – 8 hrs to complete its journey. Mucosa (inner wall) – secretes several enzymes that acts on the food. Where the pancreatic enzymes are emptied into. Digested nutrients are absorbed through intestinal walls. Absorbed materials cross the mucosa into the blood then other parts of the body for storage or further chemical change.
№21 слайд
Small Intestine Has folded
Содержание слайда: Small Intestine Has folded inner walls covered with fingerlike projections (villi; sing. – villus) Each villus has tinier projections called microvilli that absorbs digested food. Villi and microvilli increases the surface area of the small intestine for greater absorption. Peristalsis moves the undigested food to the large intestine.
№22 слайд
Movement in small intestine
Содержание слайда: Movement in small intestine: Mixing: Segmental contraction that occurs in small intestine Secretion: Lubricate, liquefy, digest Digestion: Mechanical and chemical Absorption: Movement from tract into circulation or lymph Elimination: Waste products removed from body
№23 слайд
Large Intestine a.k.a. Colon
Содержание слайда: Large Intestine a.k.a. Colon larger diameter, but shorter (5 ft) Water is absorbed from the undigested food making the waste harder until it becomes solid. Waste stays for 10 – 12 hours.
№24 слайд
Large Intestine
Содержание слайда: Large Intestine
№25 слайд
Large Intestine Waste is
Содержание слайда: Large Intestine Waste is pushed into the expanded portion (rectum) of the large intestine. Solid waste stays in the rectum until it is excreted through the anus as feces. Appendix hangs on the right side of the large intestine.
№26 слайд
Accessory Organs Produce or
Содержание слайда: Accessory Organs Produce or store enzymes that helps in digestion. Liver Largest gland of the body Stores vitamins A,D,E,K Stores sugar and glycogen Produces bile (watery, greenish substance) Secretes bile to the gall bladder via the hepatic duct and cystic duct.
№27 слайд
Accessory Organs Gall bladder
Содержание слайда: Accessory Organs Gall bladder Stores bile in between meals Secretes bile to the duodenum through the bile duct during mealtime. Bile contains bile salts, pigments, cholesterol and phospholipids. Bile is an emulsifier NOT an enzyme. Emulsifier – dissolves fat into the watery contents of the intestine.
№28 слайд
Accessory Organs Pancreas
Содержание слайда: Accessory Organs Pancreas Produces a juice that contains enzymes (amylase and insulin) to break down carbohydrates, fats and protein. Secretes the juice into the duodenum through the pancreatic duct.
№29 слайд
About the author My name is
Содержание слайда: About the author… My name is Azizullah Mohammadi . I am a student at KAZNMU.
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