Pima Medical Institute Online Education Structure of Matter Chemical Bonds Pima Medical Institute Online Education

The study of anatomy and physiology begins with chemistry Overview The study of anatomy and physiology begins with chemistry Chemistry becomes biology Macromolecules At the cellular level of organization, chemistry, in a sense, becomes biology. A cell’s working parts—its organelles—are intricate assemblies of macromolecules. Because the macromolecules that build the cells that build tissues and organs are themselves composed of atoms, the study of anatomy and physiology begins with chemistry. Build the cells that build tissues and organs

Structure of Matter 68 kg 68 kg 150 lbs. 25 lbs. Mass: The amount of a substance Matter is anything that has weight and takes up space On earth 68 kg 68 kg On moon In our surroundings Inside our bodies You take up the same volume of space Weight: How heavy a substance is Matter is anything that has weight and takes up space. This includes all the solids, liquids, and gases in our surroundings, as well as inside our bodies. Mass refers to the amount of a substance, whereas weight refers to how heavy it is. If your weight on earth is 150 pounds, on the moon it would be only 25 pounds, but your mass (in kilograms) would be the same in both places. That is, you take up the same volume of space, but weigh less on the moon, because the force of gravity is lower on the moon. On earth 150 lbs. 25 lbs. On moon The force of gravity is lower on the moon

Elements Element: A basic substance from which other things are composed All matter is composed of elements Oxygen (O) Carbon (C) Hydrogen (H) Nitrogen (N) All matter is composed of fundamental substances called elements, 90 of which occur naturally. An element is a basic substance that other things are composed from. The four most abundant elements are oxygen (O), carbon (C), hydrogen (H), and nitrogen (N).

Living organisms require 20 elements Atoms The smallest complete unit of an element Vary in size, weight, and interactions Living organisms require about twenty elements. Of these, oxygen, carbon, hydrogen, and nitrogen make up more than 95% (by weight) of the human body. Each individual element is made up of tiny, invisible particles called atoms. The atom is the smallest complete unit of an element. Atoms vary in size, weight, and the ways they interact with other atoms. Some atoms can combine with atoms like themselves or with other atoms by forming attractions called chemical bonds. Oxygen (O) Carbon (C) Hydrogen (H) Nitrogen (N) Chemical Bond

Hole’s Essentials of Human Anatomy & Physiology, 10th Edition End of presentation Resource: Hole’s Essentials of Human Anatomy & Physiology, 10th Edition The McGraw-Hill Companies, Inc.