Subscribe to Naked Science - http://goo.gl/wpc2Q1
Every other Wednesday we present a new video, so join us to see the truth laid bare...
Three weeks into your pregnancy one of the first recognisable organs to form is the heart. Without a heart there is no way of spreading around the food and oxygen the embryo needs to flourish. Until now the heart has been a dormant clump of muscle cells, but after 22 days it bursts suddenly into life when still just the size of a poppy seed. One cell spontaneously contracts, triggering its neighbours, and setting off a chain reaction, until all the heart cells are beating. Later on, when the nervous system is more developed, the brain will carefully control the rate of contraction, keeping it steadily beating and pumping for the rest of the child’s life. If he lives to 75, that will be 2.75 billion heart beats.
Clip from the award winning documentary “In the Womb”.
Watch it here - http://youtu.be/0gAsdEUNUJY
Tagged under: heart,human,development,fetus,embryonic,womb,formation,anatomical,pumping,baby,primitive,foetus,functional,cardiology,organ,vertebrate,circulatory,embryo,spontaneous,physiology,atrium,aorta,pulmonary,artery,ventricle,fetal,circulation,biology,beating,poem,rate,alive,speed,pump,science,creation,miracle,life,steady,pregnancy,coronary,oxygen,system,muscle,cells,internal,contraction,beat,poetry,poet,nervous,developed,brain,sound,nutrients,muscular,cardiologist
Find more lesson plans like this:0.2 miles in Feet: How-to & Steps
Clip makes it super easy to turn any public video into a formative assessment activity in your classroom.
Add multiple choice quizzes, questions and browse hundreds of approved, video lesson ideas for Clip
Make YouTube one of your teaching aids - Works perfectly with lesson micro-teaching plans
1. Students enter a simple code
2. You play the video
3. The students comment
4. You review and reflect
* Whiteboard required for teacher-paced activities
With four apps, each designed around existing classroom activities, Spiral gives you the power to do formative assessment with anything you teach.
Carry out a quickfire formative assessment to see what the whole class is thinking
Create interactive presentations to spark creativity in class
Student teams can create and share collaborative presentations from linked devices
Turn any public video into a live chat with questions and quizzes