Science 8 ) Communicate scientific information to explain the relationship between the
structures and functions, both mechanical (e.g., chewing, churning in stomach)
and chemical (e.g., enzymes, hydrochloric acid [HCl] in stomach), of the
digestive system, including the accessory organs (e.g., salivary glands,
pancreas).
a. Obtain and communicate information to demonstrate an understanding of
the disorders of the digestive system (e.g., ulcers, Crohn's disease,
diverticulitis).
Unpacked Content
Scientific And Engineering Practices:
Obtaining, Evaluating, and Communicating Information
Crosscutting Concepts: Cause and Effect; Structure and Function
Disciplinary Core Idea: From Molecules to Organisms: Structures and Processes
Evidence Of Student Attainment:
Students:
Analyze scientific information about the relationship between structures of the digestive system that contribute to mechanical digestion and their function.
Analyze scientific information about the relationship between structures of the digestive system that contribute to chemical digestion and their function.
Communicate information to explain the relationship between structures of the digestive system that contribute to both chemical and mechanical digestion and how their structure is related to their function.
Communicate synthesized information to differentiate among the causes and effects of digestive disorders.
Communicate synthesized information to differentiate among the treatment and prevention of digestive disorders. Teacher Vocabulary:
digestive tract/ alimentary canal
accessory digestive organs: salivary glands, pancreas, liver, gallbladder gastrulation ingestion mastication salivary amylase esophagus reverse peristalsis protease mucosa cholecystokinin gastrin secretin chyme enerokinases parenteral nutrition hepatic flatulence feces buccal/ oral cavity palate (hard and soft) intrinsic/ extrinsic tongue muscles glands (salivary, parotid, sublingual, submandibular) teeth (incisors, canine/ cuspid, bicuspid/ premolars, molars, wisdom) esophagus stomach lamina propria mucosae, submucosa adventitia/ serosa cardiac sphincter reflux regions—upper (cardiac), middle (fundic), lower (pyloric) cells (parietal, chief, mucous neck, gastric stem) glands (cardiac, fundic, pyloric) pyloric sphincter intestine (small and large) duodenum jejunum ileum villi mesentery cecum cecum appendix colon (transverse, descending, sigmoid) rectum anus dysphagia Gastroesophageal reflux disease (GERD) Crohn's disease Celiac disease Diverticulitus Inflammatory Bowel Disease Ameobic dysentery polyps hepatitis hernia pancreatitis Knowledge:
Students know:
The digestive system is composed of the digestive tract (mouth, pharynx, esophagus, stomach, small intestine, large intestine, and rectum) and accessory digestive organs (salivary glands, pancreas, liver, gallbladder).
Mechanical digestion includes chewing (mastication), swallowing, peristalsis, churning in the stomach).
Chemical digestion is contributed to by enzymes, acids, and hormones.
The hypothalamus regulates hunger and thirst.
Chemical and mechanical digestion begin in the mouth.
Perstalsis moves food through the digestive tract.
The stomach uses enzymes and acids (chemical) and churning(mechanical) to digest proteins.
Hormones produced by the stomach and small intestine regulate digestion.
Digestion of most food takes place in the proximal portions of the small intestine while absorption of digested food takes place in the distal portions.
The large intestine absorbs water and electrolytes in its proximal components and feces is formed in the distal portions.
Exocrine functions of the pancreas involve the production of digestive enzymes.
The endocrine function of the pancreas involves insulin and glucagon, which regulate sugar.
Bile production is a major function of the liver.
The gallbladder stores and releases bile, which helps with fat digestion.
Food intolerances are caused by the inability to absorb or digest food.
Polyps are outgrowths of the mucosa that can devlop into cancer.
Ulcers are caused by erosion fo the digestive tract mucosa.
Digestive system gland disorders include cirrhosis, hepatitis, and pancreatitis. Skills:
Students are able to:
Gather, read, and interpret scientific information about the structures of the digestive system that contribute to mechanical digestion.
Gather, read, and interpret scientific information about the function of the structures of the digestive system that contribute to mechanical digestion.
Gather, read, and interpret scientific information about the structures of the digestive system that contribute to chemical digestion.
Gather, read, and interpret scientific information about the function of the structures of the digestive system that contribute to chemical digestion.
Communicate scientific information, in multiple formats (e.g., orally, graphically, textually) to explain the structure and function of the mechanical and chemical digestive system, as a whole, and of its intrinsic parts.
Use scientific literature to identify conditions and diseases that effect the digestive system.
Evaluate, based on evidence, how these conditions and diseases affect the body.
Analyze data in order to make a valid and reliable scientific claim about how the body responds to the identified conditions and diseases in its attempt to maintain homeostasis. Understanding:
Students understand that:
The digestive system is made of several different tissues, organs, and accessory organs that ultimately break down food into smaller, usable molecules that can be absorbed and transported by the blood to the rest of the body's tissues.
The digestive system creates and eliminates solid waste from the parts of foods that aren't transported into the bloodstream.
Numerous organs/accessory organs are structurally designed to play several different roles in the digestion process.
Several reactions/systems (glycolysis, electron transport chain, glucogenesis, amination, TCA cycle, etc. occur and contribute to metabolism.
Several factors (genetics, diet, exercise, stress, etc.) can contribute to the development of digestive disorders.
Lifestyle choices and various medications can help alleviate digestive disorders.
Multiple systems interact to play a part in digestive pathology.
Various organs and locations within those organs are affected, depending on each digestive disorder.
