Swimming, Diving and Echolocation
Swimming• Streamlined bodies
Breathing• Quick breaths
– Can empty and re-fill lungs in 2 seconds!!!
• Renew ~90% of air in single breath– Humans ~10%
Diving Physiology• More blood than non-diving mammals
– More hemoglobin– More myoglobin
Dive Reflex• Heart rate slows
– Bradycardia• Blood flow reduced
– Vasoconstriction• Increase inlactic acid
Dive Reflex• Collapsible thoracic cavities
The Bends• Decompression Sickness
– N2
Echolocation• 1500
m/sec
• Object is 3 sec away
• 4500 m away
Spermaceti Organ
Essex