A. Describe the purpose of the respiratory system
B. List & describe the structures of the respiratory
system
C. Describe the respiratory cycle, frequency, and factors
that effect respiration in animals
D. Label the parts of the circulatory system
E. Follow the path of a blood cell through the
circulatory system
A horse must win:
1-Kentucky Derby
2- Belmont Stakes
3- Preakness
https://www.youtube.com/watch?v=8NUx
vJS-_0k
A. Describe the purpose of the respiratory system
Function of Respiratory System
1. To obtain and use oxygen
2. To eliminate carbon dioxide
B. List & describe the structures of the respiratory system
1. Nostrils
 Also called
nares
 Paired, external openings
 Separated
by nasal septum
B. List & describe the structures of the respiratory system
1. Nostrils cont’d
Dilatable
 a.
Species Differences
 i Horse--Very Pliable and Dilatable
 ii. Pig--Rigid
B. List & describe the structures of the respiratory system
2. Pharynx
 Common pathway for air and food
B. List & describe the structures of the respiratory system
3. Larynx
 "Voice Box"
 Organ of Phonation (Sound Production)
 Sound produced by controlled passage of air
which causes vibration of vocal chords
 Syrinx
 Voice Box for Birds
 Located where trachea divides from bronchi
 Vibrating Muscles
B. List & describe the structures of the respiratory system
4. Trachea
 Primary passage way to
Lungs
 Cartilage Rings prevent
collapse of airway
5. Lungs
 Main Organ
 Paired
B. List & describe the structures of the respiratory system
Cardiac Notch
- is where heart goes
B. List & describe the structures of the respiratory system
6. Alveoli
 Principle site of gaseous
diffusion between air and
blood
Respiratory System
C. Describe the respiratory cycle, frequency, and factors that
effect respiration in animals
Frequency
 A. Number of Respiratory Cycles per minute
 B. Factors affecting Respiratory Frequency

a.




Horse 12
Cow 29
Pig 40
Sheep 25
 b.

Species variations
Body Size
--Heavy animals breath heavier
C. Describe the respiratory cycle, frequency, and factors that
effect respiration in animals
Frequency Cont’d
 c.
Age
 d. Exercise
 e. Excitement (hyperventilating)
 f. Pregnancy
 g. Environmental Temperature

-Faster in heat (panting)