(a) Organs of alimentary canal of humans in sequence

Mouth/buccal cavity
Oesophagus/gullet
Stomach
Duodenum
Ileum/jejunum/small intestine
Caecum/Colon/Large intestine
Rectum.

(b)(i) Structural differences between the alimentary canal of a bird and human

Bird	Human
Beak present / mouth modified to beak	Beak absent / present of mouth
Teeth absent	teeth present
Crop present	crop absent
Gizzard present	gizzard absent
Anal pore modified to cloaca	anal pore modified to anus
Shorter alimentary canal	Longer alimentary canal
Appendix absent	appendix present

(ii) Similarities in the alimentary canal of a bird and human;
They both have mouth; oesophagus/gullet; stomach; duodenum; small intestine; large intestine; caecum; rectum.
(c) Adaptation of the dentition of herbivores for feeding

Elongated/curved incisors; for cutting grass/herbs
Thick horny pad; against which the lower incisors bit
Canines are absent/presence of diastema; allows tongue to roll the cropped grass
Broad surfaces of the cheek teeth/molars; for grinding/chewing/masticating.
Ridges/furrows on cheek teeth/molars; for grinding/chewing/masticating

(d) Roles of pancreas in digestion

Produces pancreatic juices which contain enzymes
Sodium bicarbonate in the pancreatic juice neutralizes the HCL from the stomach/produces alkaline medium
Pancreatic amylase digests starch to maltose
Trypsin in the pancreatic juice digests protein to peptides/peptones
Lipase in the pancreatic juice digests fat droplets to glycerol and fatty acid