Curated OER
AP: Chapter 42: Circulation & Gas Exchange
Immerse biology learners in circulation and gas exchange for both simple organisms and higher animals. Six pages of short-answer questions and labelling of the human respiratory system are included. This assignment was written for an...
OpenStax
Open Stax: Anatomy & Physiology: Structure and Function of Blood Vessels
Learn the structure and function of the blood vessels of the human cardiovascular system.