Human Anatomy & Physiology PDF

Human Anatomy & Physiology Sept 6 OpenStax 2.1 Matter and energy Tortora 2.1 The body is made up of chemicals. All physiological reactions (movement, digestion, nervous system, pumping of the heart)...

Human Anatomy & Physiology Sept 6 OpenStax 2.1 Matter and energy Tortora 2.1 The body is made up of chemicals. All physiological reactions (movement, digestion, nervous system, pumping of the heart) rely on chemistry. ________ is the “stuff” of the universe. It has mass and occupies space. ________ affects matter. Kinetic energy puts matter in motion. Potential energy is stored energy. 3 Human Anatomy & Physiology Sept 6 OpenStax 2.1 Elements and atoms Tortora 2.1 All matter is composed of ____________, which are substances that cannot be broken down into simpler substances by ordinary chemical methods. _______ are the smallest units of matter that retain the properties and characteristics of an element. 4 Human Anatomy & Physiology Sept 6 OpenStax 2.1 Elements of the human body Tortora 2.1 Carbon, oxygen, hydrogen and nitrogen make up 96% of the human body. Calcium, phosphorus, potassium, sulphur, sodium, chlorine, magnesium and iron are “lesser elements” that comprise about 3.6% of total body mass. Aluminium, boron, chromium, cobalt, copper, fluorine, iodine, manganese, selenium, zinc and others occur in trace amounts (