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Human Digestive system (HDS) – Digestion and Organs of digestive system
Содержание
- 1. Human Digestive system (HDS) – Digestion and Organs of digestive system
- 2. NUTRIENTS and DIGESTIVE SYSTEMThe energy that food
- 3. Слайд 3
- 4. Digestion
- 5. Digestive system organsThe digestive tract is comprised
- 6. Digestive systemThe major glands which secrete substances
- 7. MOUTHThe structures found in the mouth are
- 8. Tongue regionsSweet foods are tasted at the
- 9. PharynxThe pharynx is a cavity located directly
- 10. Esophagus (25 cm)The esophagus is a pipeIt
- 11. StomachThe largest portionCardiac sphincter, a valve through
- 12. The stomach is composed of three layers
- 13. Gastric glands produce- hydrochloric acid (HCl)- pepsinogen
- 14. Small Intestine (6 m)It has 3 segments:-
- 15. Слайд 15
- 16. Large Intestine (1.5 to 2 meters in
- 17. PancreasMixed glandIt’s secretions have basic characteristics –
- 18. LiverThe liver is the largest organ of
- 19. Functions of the liverFormation and secretion of
- 20. Скачать презентанцию
NUTRIENTS and DIGESTIVE SYSTEMThe energy that food provides is necessary for the continuity of life on earthFood can be divided into six groups:- carbohydrates - lipids - proteins- vitamins - minerals-
Слайды и текст этой презентации
Слайд 2NUTRIENTS and DIGESTIVE SYSTEM
The energy that food provides is necessary
for the continuity of life on earth
Food can be divided
into six groups:- carbohydrates
- lipids
- proteins
- vitamins
- minerals
- water
Слайд 5Digestive system organs
The digestive tract is comprised of the
-
mouth
- pharynx
- esophagus
- stomach
- small intestine
- large intestine
DRAW
Слайд 6Digestive system
The major glands which secrete substances are
- salivary
glands
- glands of the stomach
- glands in the intestinal wall
-
pancreas- liver
Слайд 7MOUTH
The structures found in the mouth are
- the teeth
-
salivary glands
- the tongue
Function of teeth is to grind
food into small particles and to mix it with digestive secretions
Слайд 8Tongue regions
Sweet foods are tasted at the tip of the
tongue
Bitter foods are tasted at the rear
Sour and salty foods
are simultaneously tasted on both sides of the tongueSalt and sour
Salt and sour
Bitter
Sweet
Слайд 9Pharynx
The pharynx is a cavity located directly behind the mouth,
in front of the esophagus and trachea
Слайд 10Esophagus (25 cm)
The esophagus is a pipe
It passes from the
pharynx to the stomach
A rhythmic contraction of the digestive tract
is called peristalsis, pushes the food Peristalsis begins in the esophagus
Слайд 11Stomach
The largest portion
Cardiac sphincter, a valve through which food enters
the stomach
Pyloric sphincter - it regulates the movement of
chyme (a soupy liquid) into the duodenum
Слайд 12The stomach is composed of three layers of smooth muscle
They
regulate the movement of stomach
Stomach has a mucosal layer (слизистая
оболочка)Mucosal layer has gastric glands
Stomach
Слайд 13Gastric glands produce
- hydrochloric acid (HCl)
- pepsinogen (enzyme) into the
gastric juice, where it is converted to pepsin by HCl
acidStomach
Слайд 14Small Intestine (6 m)
It has 3 segments:
- duodenum (25 cm)
-
jejunum
- ileum
Function of the jejunum is the absorption of nutrients
into the blood, because this part of small intestine has villiVilli – 4 millions
Слайд 16Large Intestine (1.5 to 2 meters in length)
It has 3
segments:
- caecum
- colon
- rectum
The appendix, a projection of the
caecumThis organ may become inflamed causing severe pain
In such cases, it must be surgically removed
Слайд 17Pancreas
Mixed gland
It’s secretions have basic characteristics – neutralizes acidic (HCl)
condition which comes from stomach
It opens into small intestine
Hormones
– glugacon and insulin
Слайд 18Liver
The liver is the largest organ of the body and
gland
It contains the gall bladder
Bile duct leading from the gall
bladder transmits bile salts, which break down fats in the duodenum
Слайд 19Functions of the liver
Formation and secretion of bile
Regulation of blood
sugar level
Formation of fibrinogen and thrombogen, which are active during
blood clottingDetoxification of substances (ex, alcohol is broken down in liver)
Stores Fe, Cu ions and vitamins A, D, E and K
