CHAPTER
Absorption, Digestion, and
Exchange
NEW CHAPTER
the BIG idea
Systems in the body obtain and process materials and remove waste.
2.1 The respiratory system gets oxygen and removes carbon
dioxide.
2.2 The digestive system breaks down food.
2.3 The urinary system removes waste materials.
CHAPTER OUTLINE
2.1
CHAPTER HOME
KEY CONCEPT
The respiratory system gets oxygen and removes
carbon dioxide.
• Your body needs oxygen
VOCABULARY
• Structures in the respiratory system function together
respiratory system
• Your respiratory system is involved in other functions
cellular respiration
trachea
bronchial tube
lung
diaphragm
SECTION
OUTLINE
2.2
CHAPTER HOME
KEY CONCEPT
The digestive system breaks down food.
VOCABULARY
nutrient
Structure
Mouth
Esophagus
Function
mouth
digestion
chemical and mechanical
digestion
digestive system
movement of food by
peristalsis from mouth to
stomach
esophagus
peristalsis
stomach
Stomach
chemical and mechanical
digestion; absorption of
broken-down nutrients
Small
intestine
chemical digestion;
absorption of broken-down
nutrients
Large
intestine
absorption of water and
broken-down nutrients,
elimination of wastes
small
intestine
large
intestine
SECTION
OUTLINE
2.3
CHAPTER HOME
KEY CONCEPT
The urinary system removes waste materials.
VOCABULARY
Waste Removal
urinary system
Respiratory System
removes carbon
dioxide
Urinary System
removes wastes
from body
Kidneys
Digestive system
removes wastes
from food
Skin
removes
water
urine
Urine
Kidneys
SECTION
OUTLINE
2.1
KEY CONCEPT
CHAPTER HOME
The respiratory system gets oxygen and removes
carbon dioxide.
I. The respiratory system gets oxygen and removes
carbon dioxide.
A. Your body needs oxygen.
VOCABULARY
respiratory system
cellular respiration
1. Exchanging Oxygen and Carbon Dioxide
2. Cellular Respiration
B. Structures in the respiratory system function
together.
C. The respiratory system is also involved in other
activities.
1. Speech and Other Respiratory Movements
2. Water Removal
KEY CONCEPT
SUMMARY
2.2
KEY CONCEPT
CHAPTER HOME
The digestive system breaks down food.
II. The digestive system breaks down food.
VOCABULARY
nutrient
A. The body needs energy and materials.
digestion
B. The digestive system moves and breaks down
food.
1. Mechanical Digestion
digestive system
peristalsis
2. Chemical Digestion
C. Materials are broken down as they move
through the digestive tract.
D. Other organs aid digestion and absorption.
KEY CONCEPT
SUMMARY
2.3
KEY CONCEPT
CHAPTER HOME
The urinary system removes waste materials.
III. The urinary system removes waste materials.
A. Life processes produce waste.
VOCABULARY
urinary system
urine
B. The urinary system removes waste from the
blood.
C. The kidneys act as filters.
1. The Nephron
2. Water Balance
KEY CONCEPT
SUMMARY