Digestive System Matching Assignment
Instructions
Type the letter of the correct answer from Column B in each box in Column A. Then click Check Answers to see your score. Click Reset to try again.
Background: Parts of the Digestive System
- Mouth: Ingests food, chews, and begins digestion of carbohydrates.[web:108][web:114]
- Esophagus: Muscular tube that moves food to the stomach by peristalsis.[web:108]
- Stomach: Stores food, churns, and begins protein digestion with acid and enzymes.[web:108][web:111]
- Small intestine: Main site of chemical digestion and nutrient absorption.[web:108][web:121]
- Large intestine: Absorbs water and forms feces.[web:108][web:110]
- Liver: Produces bile for fat digestion.[web:114][web:120]
- Gallbladder: Stores and concentrates bile.[web:114][web:120]
- Pancreas: Secretes digestive enzymes for carbohydrates, proteins, and fats.[web:111][web:121]
Background: Digestive Cells and Their Functions
- Parietal cells (stomach): Secrete hydrochloric acid and intrinsic factor.[web:113][web:119]
- Chief cells (stomach): Secrete pepsinogen, which becomes pepsin to digest proteins.[web:113][web:119]
- Mucous (surface) cells: Secrete mucus to protect the stomach lining from acid.[web:119]
- Enterocytes (small intestinal absorptive cells): Absorb nutrients into blood and lymph.[web:116][web:119]
- Goblet cells: Secrete mucus to protect and lubricate the intestinal lining.[web:116][web:119]
- Enteroendocrine cells: Release hormones that regulate digestive secretions and motility.[web:119]
- Pancreatic acinar cells: Produce and secrete digestive enzymes into the small intestine.[web:119][web:121]
- Hepatocytes (liver cells): Produce bile and process nutrients and toxins.[web:116][web:119]
Background: Digestive Enzymes and Their Functions
- Amylase: Breaks down complex carbohydrates into smaller sugars.[web:112][web:118]
- Lipase: Breaks down fats into fatty acids and glycerol.[web:112][web:118]
- Protease (e.g., trypsin, pepsin): Breaks down proteins into peptides and amino acids.[web:112][web:121]
- Maltase: Breaks maltose into glucose.[web:121]
- Lactase: Breaks lactose into glucose and galactose.[web:121]
- Sucrase: Breaks sucrose into glucose and fructose.[web:121]
- Pepsin: Active stomach enzyme that begins protein digestion.[web:113][web:121]
Matching Questions (15)
Column A: Type the correct letter from Column B. Click next to the number to add your letter of choice
1. Mouth
2. Small intestine
3. Stomach
4. Liver
5. Pancreas
6. Parietal cell
7. Chief cell
8. Enterocyte
9. Goblet cell
10. Amylase
11. Lipase
12. Protease (trypsin)
13. Pepsin
14. Lactase
15. Gallbladder
Column B: Answers
A. Main site of nutrient absorption and most chemical digestion
B. Secretes hydrochloric acid to activate pepsin and kill microbes
C. Begins mechanical digestion and starts starch digestion with saliva
D. Stores and concentrates bile until it is needed for fat digestion
E. Produces bile and processes nutrients absorbed from the intestine
F. Produces digestive enzymes for carbohydrates, proteins, and fats
G. Secretes pepsinogen, which is converted into a protein-digesting enzyme
H. Absorptive epithelial cell that takes in digested nutrients
I. Mucus-secreting cell that protects and lubricates the intestinal lining
J. Enzyme that digests fats into fatty acids and glycerol
K. Enzyme that begins to break down starch into smaller sugars
L. Enzyme that digests proteins in the stomach at low pH
M. Enzyme that digests proteins in the small intestine
N. Enzyme in the small intestine that breaks down milk sugar (lactose)
O. Muscular sac that churns food and begins protein digestion with acid