quinta-feira, 17 de novembro de 2011

Coisas do coração: batimento

Do Guardian:
"In the first of four scientific tours of the heart, Prof Michael Shattock of King's College London tells the story of a single heartbeat. How does a tiny electrical signal from the pacemaker cells kick off the tightly coordinated series of muscular contractions needed to pump blood around the body?" (aqui)

Nenhum comentário:

Postar um comentário