3D animation and how the heart works

So here is my main portion of the project that is 3-D animation, my group have been talking a lot about the animation and what it is to represent, we talked about the camera following the blood cells around the veins, but I want to do something simple so the user is not distracted on what is going on off screen (if we do go with the two screen ideas). We want the user to be fully immersed on the scary/calm videos. I would like to create an animation and 3-D model that it just shows the heart and each of its chambers beating, representing the users own heart beat. Below is an example of what I want to achieve. 

Below is a still of an example I have been working on for a while, it is just the outer shell representation of the heart. Definitely not what my team was expecting me to do so I thought I would use that as a reference, or a fall back if things don't work out.

The heart has 4 chambers, the left and right atrium, and the right and the left ventricle. The two ventricles pump oxygenated blood towards the body, and the atrium's pull de-oxygenated blood towards the heart so it can be re-oxygenated. And the four heart valves (tricuspid, pulmonic, mitral and aortic) keep the blood moving in the right direction through the heart.

Below is an animation done by Natalie, which represents how I want to animate my heart model. Each chamber beating in turn like the real beating heart does.

PULSE RATES-'Taken from How Stuff works'

Everyone's pulse (average heart rate per minute) changes as we age. Here is a list of average pulse rates at different ages:

• Newborn: 130 bpm
• 3 months: 140 bpm
• 6 months: 130 bpm
• 1 year: 120 bpm
• 2 years: 115 bpm
• 3 years: 100 bpm
• 4 years: 100 bpm
• 6 years: 100 bpm
• 8 years: 90 bpm
• 12 years: 85 bpm
• adult: 60 - 100 bpm