Friday, 31 January 2014

Digestive System

Digestive System Purpose The digestive system prepares feed for use by hundreds of millions of body cells. Food when eaten cannot reach cells (because it cannot bye through the intestinal walls to the bloodstream and, if it could would not be in a useful chemical state. The gut modifies food physically and chemically and disposes of unusable waste. Physical and chemical modification (digestion) depends on exocrine and endocrine secretions and controlled movement of food through the digestive tract. Mouth Mouth Food enters the digestive system via the brim or oral endocarp, mucous membrane lined. The lips (labia) protect its outer(prenominal) opening, cheeks wreak lateral walls, hard palate and soft palate chassis anterior/posterior roof. Communication with nasal cavity coffin nail soft palate. Floor is muscular tongue. Tongue has otiose attachments (styloid process, hyoid bone) attached to floor of mouth by frenulum. bottom of the frame of reference exit fro m mouth guarded by a halo of palatine/lingual tonsils. Enlargement ...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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