Digestion A comparison between human and felines by Julia Hughes - - PowerPoint PPT Presentation
Digestion A comparison between human and felines by Julia Hughes Definition Digestion is the process by which chemicals are broken down into smaller components by the body that can be absorbed by the blood stream. Mechanical and chemical
by Julia Hughes
Digestion is the process by which chemicals are
broken down into smaller components by the body that can be absorbed by the blood stream. Mechanical and chemical digestion begins in the mouth where food is crushed and ground by teeth, mixed with saliva – produced by the salivary glands - which helps to break down starches.
Digestive enzymes are produced in the stomach
which in turn, continues to break food down mechanically and chemically through the mixing with enzymes and the churning of the stomach.
Absorption occurs in the stomach and gastrointestinal
tract (also known as the alimentary canal) and finishes with excretion or defecation which is the elimination of solid, semisolid or liquid waste material or faeces from the digestive tract via the anus.
The Human Skull The Feline Skull
Human Feline Incisors 4/4 6/6 Canines 2/2 2/2 Pre-molars 4/4 6/4 Molars 6/6 2/2
Human tongue Cat tongue
Human Salivary Glands Cat Salivary Glands
1 Parotid gland 2 Sublingual gland 3 Submandibular gland 4 Esophagus 5 Tongue 6 Masseter muscle 7 Larynx 8 Trachea
The action of chewing and mixing food with saliva
turns it into a soft paste, which is then swallowed and passed into the oesophagus.
The oesophagus is a small hose-like tube, which
connects the mouth to the stomach. As it leaves the mouth, it follows a straight path through the neck and chest, passing near the heart through the diaphragm muscle and finally entering the stomach.
The oesophagus walls are composed of muscles,
which move in wave-like contractions to push food into the stomach called peristalsis.
Human Stomach Cat Stomach
Human Intestines Cat Intestines
Julia Hughes HNC Animal Studies