Section 9 - Nutrition Flashcards
What are the two trophic levels?
Autotrophs
Heterotrophs
What is ingestion?
When an organism takes in their food while or piece by piece
What are the three types of heterotrophs?
Herbivores - eat autotrophs
Carnivores - eat heterotrophs
Omnivores - eat both
What are the 4 stages of food processing?
Ingestion
Digestion
Absorption
Elimination
What is required for digestion?
Specialized compartments to avoid damage to body cells
What is a gastrovascular cavity? How does it digest food?
A digestive sac with a single opening
Extracellular, then intracellular
What are the two types of cellular digestion?
Intracellular digestion
Extracellular digestion
What is the advantage of extracellular digestion?
You can eat larger food
What is an alimentary canal?
A complete digestive tract
What is the advantage of one-way movement of food?
Allows for specialization of different regions of the digestive tract
What are the four layers of the mammalian digestive system?
Mucosa (epithelial tissue)
Submucosa (connective tissue)
Muscularis (muscle)
Serosa (connective tissue)
What are the (6) parts of the human digestive system?
Mouth Pharynx(throat) Esophagus Stomach Small intestine Large intestine Anus
Where does most digestion take place?
Small intestine
What does the pancreas do?
Secretes digestive enzymes
Secretes bicarbonate
What is the function of the liver?
Produces bile which emulsifies fats