Digestive Systems (8.12) Flashcards Preview

Biology > Digestive Systems (8.12) > Flashcards

Flashcards in Digestive Systems (8.12) Deck (33):
1

It is the source of chemical energy used to create ATP (molecule of cellular work) in the process of cellular respiration.It can also serve as the raw building materials for “making” the organism.

Food

2

This condition is caused by a lack of food.

undernourishment

3

This condition is caused by too much food in the diet. Condition can cause Obesity and heart problems.

overnourishment

4

This condition is caused by eating poor quality food.

Malnourished

5

These are plant eaters.

herbivores

6

These are meat eaters.

carnivores

7

These are plant and meat eaters. (“omni” means “all”)

omnivores

8

whales, sponges, bivalves

Suspension/filter feeding

9

maggots (Substrate refers to “surfaces”. They live in or on their food source.)

Substrate feeding

10

(earthworms) (They eat substances deposited in the soil.)

deposit feeders

11

(mosquitoes, hummingbirds) (Feed on fluids such as blood or plant nectar.)

fluid feeders

12

(Humans and most other animals) (Bulk refers to “large quantities at one time”.)

Bulk feeders

13

This is the putting of food in the mouth.

ingestion

14

This is the breakdown of food.;

digestion

15

This refers to trouble breaking down food.

indigestion

16

Accomplished through enzymatic hydrolysis primarily.
Aided by mechanical (grinding/chewing) digestion as well.

Digestion

17

Food molecules then undergo __________ into the circulatory system or diffusion into the surrounding tissues.

absorption

18

Elimination of waste (about ___% of what is eaten) occurs at the end of the tract (anus) or out the mouth/anus for primitive animals.

10

19

Where Digestion occurs: It starts as a single opening _______ (sponges) evolves over time into a single opening mouth/anus of a ________ cavity (Cnidarians and Platyhelminthes)

osculum, gastrovascular

20

Gastrovascular cavities evolved into a two opening digestive tracts (A.K.A. ________ Canal) over millions of years.

Alimentary

21

Starts digestion by breaking food up into smaller pieces.

Mouth/teeth

22

This muscular tube sucks food up into the tract.

Pharynx

23

This structure lubricates food for passage through the tract.

Esophagus

24

(food storage)

Crop

25

(food breakdown)

gizzard

26

the crop and gizzard combined to form the _____

stomach

27

This organ finishes food breakdown and also food absorption.

small intestines

28

This organ is for waste collection and water reabsorption.

large intestines

29

Where waste material exits the body.

anus

30

related to diets (Just like beaks for birds.)

teeth types

31

Increased _______ size for carnivores.

stomach

32

Carnivores have short digestive tracts; herbivores have long digestive tracts.

length of digestive tract

33

This structure contains cellulose digesting bacteria. (Animals are ruminants.)(They chew cud.)

Rumens in herbivores