The Human Gas Exchange System Gas exchange takes place in the human thorax. This is a collection of organs and tissues in the chest cavity The main structures of the human gas exchange system Thora...
Heart Action: Initiation & Control Control of the basic heartbeat is myogenic, which means the heart will beat without any external stimulus This intrinsic rhythm means the heart beats at aroun...
The Cardiac Cycle The contraction of the heart is called systole, while the relaxation of the heart is called diastole Atrial systole is the period when the atria are contracting and ventricular sy...
The Walls of the Heart The muscular walls of the atria are thinner than those of the ventricles When the atria contract, the thin muscular walls do not generate much pressure, but enough to force b...
英国留学选专业是个技术活，好的专业能够为今后的职业生涯开辟一条广阔的道路。哪些专业在就业市场上最受欢迎？今天就来讲讲罗素大学集团最受欢迎学科之一：地理学专业怎么样？ 专业定义 地理学专业是一门从各种...
Mammalian Heart Structure Heart structure The human heart has a mass of around 300g and is roughly the size of a closed fist The heart is a hollow, muscular organ located in the chest cavity It is ...
The Bohr Shift Changes in the oxygen dissociation curve as a result of carbon dioxide levels are known as the Bohr effect, or Bohr shift When the partial pressure of carbon dioxide in the blood is ...
The Oxygen Dissociation Curve The oxygen dissociation curve shows the rate at which oxygen associates, and also dissociates, with haemoglobin at different partial pressures of oxygen (pO2) Partial ...
Plasma & Carbon Dioxide Waste carbon dioxide produced during respiration diffuses from the tissues into the blood This waste carbon dioxide is transported around the body in different ways In t...
