Heart of an Athlete

The Shark’s heat is very similar to the human heart in how it works, but it is laid out a bit differently. Like a human it has a four chambered heart but the components are the sinous venosusauricle, ventricle, and the conus arteriosus.  Shown in the picture below.

The Heat located behind the gills, pumps the oxygen blood collected there throughout the body into working tissues, like the human SA &VA node , the sinous venosus controls the heart contractions. The Auricle is like our atriums which collect the blood in its chamber. When the blood reaches the ventricle in a white shark, its thick muscle walls squeeze the blood into vessels that are carried throughout the body contains capillaries and veins, making a pass through the gills to collect oygen and back to the heart. It is unsure what the conus arterious ‘s function is in the heart, but it’s structure suggest that it prevents backflow of blood into the heart.

Work Cited : Martin. A. M. Heart of an Athlete. Retrieved From: http://www.elasmo-research.org/education/white_shark/heart.htm

They can smell other blood, but what about their blood?

The Great White Shark is interesting because its blood temperature is almost always warmer than the water surrounding it. Scientists say this allows for easier and faster digestion of food. This is due to its modified circulatory system, which is a bonus for being cold blooded. The heating up of he sharks anatomy is called regional endothermy, and works on places where most of the nerves are. This allows the big fish better vision, and movement due to heated muscle. Due to excess amounts of hemoglobin in the sharks blood, this is an indicator for a higher metabolism aswell.


Work Cited : Harris. T.H. Great White Sharks and More. Retrieved From: http://www.sealifepix.com/introduction.html

Roesch. B. R. (1997) White Shark Physiology: Warm Bodied and Ready to Go. Retreived from : http://web.ncf.ca/bz050/wsphysio.html