Week 7: Digestive System

starting from the mouth and ending in the anus

responsible for secretion of digestive juices containing enzymes for digestion of food

like lips, teeth, tongue, which aid in the physical digestion of food

- anterior opening of the tube for the entrance of food
- Surrounded by lips

In the mouth is where   Occurs

act of chewing

act of swallowing

cavity immediately posterior to the mouth and bounded by the Cheeks, Tounge, Hard and soft palate, Teeth, and Tonsils.

2 Classifications of Teeth

4 Types of Teeth

posterior part of the oral cavity for passage of food and air

collapsible muscular tube extending from the pharynx through an opening in the diaphragm (hiatus) to the stomach

Esophagus is   long and   in diameter

Secretes mucus and facilitate passage of food

highly muscular pouch found in the epigastric and left hypochondriac portions of the abdominal cavity

Stomach highly muscular pouch found in the   and   portions of the abdominal cavity

this guards the opening of the esophagus and stomach

this guards the opening of the pylorus into the duodenum

Stomach is where food is   (  occurs

longest part of the digestive tube

Small intestine is   long and   in diameter

Intestine is devided into three portions

Ducts from the liver, gallbladder, and pancreas enters the this to provide juices that neutralize acids coming from the stomach and help digest proteins, carbohydrates, and fats.

The color of this is deep red because of its extensive blood supply, its peristaltic movements are rapid and vigorous.

Blood supply is more limited and peristaltic movements are slower

Receives secretions from the liver (bile), gall bladder (bile), and pancreas (pancreatic juice)

it is the site of final digestion of food and absorption of digested food

most posterior part of the digestive tube

Large intestines are   long and   in diameter

3 parts of Large Intestines

For water and Na ion absorption (dehydration) and temporary storage of fecal matter

absorbs fluids and salts that remain after completion of intestinal digestion and absorption and to mix nuts contents with lubricating substance which is mucus

lubricate waste products, absorb remaining fluid and salts, and store waste products until they are ready to be passed from the body. Most absorption occur in the ascending and transverse regions, where liquid material received from the small intestine is dehydrated to form fecal mass.

terminal segmentation of the digestive system in which feces accumulate just prior to discharge.

terminal opening of the digestive tube for defecation

Act of pssing a stool/feces

3 Salvary Gland

What Salivary Gland is mentioned?

below the ear

What Salivary Gland is mentioned?

floor of the oral cavity close to the angel of the jaw

What Salivary Gland is mentioned?

floor of the cavity under the tongue

- Microscopic glands found in the gastric mucosa
- Secrete gastric juice provided with enzymes

- Microscopic unicellular glands in the intestinal mucosa
- Secrete intestinal juice or succus entericus with enzymes

Largest gland divided into lobes

6 main function of liver

Large lobulated gland which is both endocrine (insulin) and exocrine (pancreatic juices) gland

Pancreatic cells connected with  

Physical and chemical conversion of food to simple absorbable forms

1.   ← Carbohydrates
2.   ← Proteins
3.   ← Lipids
4.   ← Nucleic acid

  (esophagus) →   (liquid) (small intestine) →   (large intestine)