Mammalian Diving Reflex

Mammalian Diving
Reflex
Cardiovascular System
  Functions:
  Supply needed materials
  Remove Wastes
  Prevent disease
  Example: Blood carries oxygen from
your lungs to your other body cells
The Heart
Metabolism
  Metabolism: the processes that keep
you alive
  Why do your cells need oxygen?
Metabolism
  Supply vs. Demand
Supply:
How much
is available
Demand:
How much
you need
Apnea
  Apnea: temporary stop in breathing
  When does apnea happen?
Response to Apnea
“Mammalian
Diving Reflex”
Supply of
oxygen is
limited
Reduce
metabolic
demands
1. Lower
heart rate
2. Restrict
blood flow
Mammalian Diving Reflex
Before
After
During
Investigating MDR