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Nutrition and Digestion Lecture 5-2

Overview of Animal Nutrition ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Dietary Categories

How do Animals Obtain Food Suspension feeders – extract food particles suspended in surrounding water Substrate feeders – live in or on food source and eat their way through it Fluid feeder – gets food by sucking nutrient-rich fluids from living host Bulk feeders – Ingest large pieces of food Tube worm

The Four Stages of Food Processing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Digestion: A Closer Look ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Digestive Compartments ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Specialized organs are along the length to perform 4 main functions of food processing

The Mouth ,[object Object],[object Object],[object Object],[object Object]

The Pharynx ,[object Object],[object Object],[object Object]

The Esophagus ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Stomach ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Stomach Ailments ,[object Object],[object Object],[object Object],Acid Reflux (“Heart burn”) – backflow of chyme into lower end of esophagus.

The Small Intestine ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Bile has salts that bind to fat preventing them from reforming large globules. Helps lipase work on them more efficiently.

Absorption of Nutrients ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Large Intestine (and Beyond) ,[object Object],[object Object],[object Object],[object Object],[object Object],Cecum ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Human Nutritional Requirements ,[object Object],[object Object],[object Object],[object Object]

Food as Fuel ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Metabolic Rate – How fast do we burn our food? ,[object Object],[object Object],[object Object]

Food as Building Material ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],- Kwashiorkor is caused by inadequate protein intake. -This causes deficiency in the blood protein, manifesting in the swelling of belly and limbs ,[object Object],[object Object],[object Object],Scurvy – Lack of vitamin C

Essential Amino Acids ,[object Object],[object Object]

Vitamins ,[object Object],[object Object],[object Object],[object Object]

Minerals ,[object Object],[object Object],[object Object],[object Object]

Essential Fatty Acids ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Figure 22.24 Remember, the best way to maintain a healthy weight is to eat a balanced diet and get plenty of exercise.

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