Stomach

Question 1

Chemical digestion of stomach

Answer 1

Pepsinogen and hydrochloric acid screwed separately and then mix to crest pepsin
Breaks proteins down into polypeptides

Question 2

Mechanical digestion in stomach

Answer 2

Waves of contractions which churn food into chyme

Achieved by double muscle layer- oblique, and longitudinal and circular muscle

Question 3

Structure of stomach

Answer 3

Mucosa lining- protects from acid
Gastric pits and gastric glands deep inside wall of stomach and secret pepsinogen, hydrochloric acid and mucus separately
Oblique muscle layer and longitudinal and circular muscle layer- for churning
Larger- hold more content and store food