Biological Networks

Studying all the cells in the human body is an enormous endeavor—current estimates suggest that an average human being is made of at least 37.2 trillion cells. To take on this bold task, in our first draft atlas we are focusing on tissues that will not only reveal interesting biology, but also inform us about efficient and effective sampling and analysis strategies for a full-scale cell atlas effort. Each of these tissues, organs, organ systems or focus areas is the subject of an HCA Biological Network. Contact information for the coordinators of each network is included in the network descriptions below.

Join a Biological Network


  • Please join the HCA membership here, indicating which Biological Network(s) you are interested in.
  • If you are already an HCA member, please email indicating which Biological Network(s) you are interested in, or email the relevant Biological Network Coordinator.



Biological Network Seminar Series


The goals of this seminar series are:

  • To increase biological network visibility and spark new opportunities for collaboration and engagement;
  • To promote coordination with other networks and consortia; and
  • To lay the groundwork for drafting Atlas roadmaps in each biological area.

The HCA Biological Network Seminar Series is made possible through the generous support of the Chan Zuckerberg Initiative.

A list of current and past seminars are available here.