Digestion And Absorption Flashcards
Major components of food
Carbohydrates, proteins, fats
Minor components of food
Vitamins and minerals
Role of food
Provides
- energy
- organicmaterials for growth
- and repair
- water helps in metabolism and prevents dehydration
______ cannot be used by the body in their original form
Biomacromolecules
Digestion
The process of conversion of complex food substances into simple absorbable forms through mechanical and biochemical methods
Parts of the digestive system
Alimentary canal
Associated glands
Alimentary canal
Tubular structure which extends anteriorly from the mouth till the posterior anus.
It develops from ectoderm and endoderm
The mouth leads to the
Buccal or oral cavity containing teeth and a muscular tongue
The mouth is a horizontal transverse slit like aperture surrounded by upper and lower lip.
Specific muscle associated with lip is called orbicularis oris
Parts of buccopharyngeal cavity
Buccal vestibule
Main oral cavity
Types of dentition
Thecodont~ teeth embedded in socket
Diphyodont~ two sets of teeth in lifetime
Heterodont~ differen types of teeth
Buccal vestibule
Space between gums and cheeks where food is temporarily stored. It is a peripheral part
Main oral cavity
Inner and central part surrounded by upper and lower jaw, lined by stratified squamous epithelium
Hard palate
Anterior part of palate
Made of MAXILLA and PALATINE bones in human
Projections/transverse ridges on the ventral part called PALATINE RUGAE
s o f t PaLate
Posterior part of palate .
made of muscle fibrous connective tissues and mucous epithelium ( stratified squamous epithelium )
uvula/ Velum Palati
Posterior outgrowth of soft palate
Hangs down in the form of finger like processes
Internal nasal pores present on the dorsal side
It covers the internal opening of the nasal pores during ingestion of food to prevent it from entering the nasal chamber
It is situated in the pharynx
