Upload
magdalen-dean
View
215
Download
0
Embed Size (px)
Citation preview
Digestive System
Organs Involved
Mouth Oral Cavity Food enters – Ingested Roof, Walls, Floor
• Mucous Membrane Physical & Chemical
Breakdown of food
Teeth Physical
Breakdown of Food
Mastication 2 years old – 20 17 to 24 – 32
4 Types• Incisors• Canines• Premolars• Molars
Tongue Muscle
• Moves food around in mouth
• Bolus Frenulum
• Connects tongue to floor
Sensory Small
Elevations• Papillae
–Salt–Sour–Sweet–Bitter
Salivary Glands Produce Saliva Chemical Breakdown
• Salivary Amylase• Carbohydrates
3 Pair
Pharynx Tube Smooth muscle Mucous Membrane Back of mouth
• Connects with Respiratory
Esophagus Tube Smooth Muscle Connects Pharynx to
Stomach About 25 cm long
Know these Parts Nasopharynx Esophagus Tongue Molars Parotid Salivary
Gland Oropharynx Epiglottis
Laryngopharynx Submandibular
Salivary Gland Sublingual Salivary
Gland Incisors
Know these terms Ingestion Digestion Physical Breakdown Chemical Breakdown
Chyme Bolus Mastication Peristalsis Salivary Amylase HCl
STOMACH Smooth Muscle
• Mechanical Breakdown–Peristalsis
Gastric Glands• Chemical Breakdown
–Hydrochloric Acid & Enzymes
Chyme
LIVERUnder DiaphragmLargest GlandProduces Bile
• Emulsifies Fat• Mechanical
GALL BLADDERUnder LiverStores Bile
•Fat in Duodenum•Triggers hormone Cholecystokinin CCK
PANCREAS Behind Stomach C Shaped Produces
• Pancreatic Juice• Most Important
–Digests ALL 3 foods• Insulin
–Blood Stream
SMALL INTESTINE Twisted
• 7m long Smooth Muscle Intestinal Glands
• Digests Food Villi
• Increase Surface Area• Nutrients Diffuse into Blood
Parts Duodenum
• Right after stomach• Pancreas & Liver Dump
Jejunum• Most Digestion
Ileum• Empties into Large Intestine
LARGE INTESTINE Chyme to Fecal Matter Water & Salts Reabsorbed Bacteria
• Breakdown Cellulose• Produce Vitamin K• Some B Vitamins
ASCENDING TRANSVERSE DESCENDING SIGMOID RECTUM
APPENDIX Start Distal Ascending Colon Twisted Great spot for bacterial
growth