Download Chapter 30.3

HUMAN SYSTEMS
Digestive, Respiratory, Circulatory, and
Excretory Systems
DIGESTIVE SYSTEM
1)
Delivers
nutrients
(glucose) to the
circulatory
system
RESPIRATORY SYSTEM
2)
Oxygen molecules move from the air to the
alveoli of the lungs and then to the circulatory
system
O₂
O₂
CIRCULATORY SYSTEM
3)
From the circulatory
system, glucose and
oxygen molecules
move from the
capillaries into the
cells of the body
where cellular
respiration occurs
CELLULAR RESPIRATION
oxidized
4)
O₂ + C6H12O6
(glucose)
CO₂ + H₂O + ATP
(energy)
REMOVAL OF CO₂
5)
The gas exchange process is reversed for the
removal of CO₂
CO₂
CO₂
HOMEOSTASIS - BLOOD SUGAR
6)
The concentration of
sugar in the blood is
monitored

Sugar can be stored or
pulled from reserves
(glycogen) in the liver
and muscles to
maintain a constant
blood sugar level
AMINO ACIDS
Amino Acids
contained in proteins
can also serve as an
energy source, but
first they must be
deaminated, or
chemically converted
in the liver
 This produces a toxic
ammonia product,
which is converted to
water-soluble urea
and excreted by the
kidneys
7)
1)
2)
3)
4)
What is the main purpose of the
Respiratory System?
What is the main purpose of the
Digestion System?
Write the formula for Cellular
respiration?
What is a main purpose of the
Circulatory system?