AN INTRODUCTION TO THE HUMAN BODY
Education is for improving the lives of others and for leaving your community and world better than you found it.
Marian Wright Edelman
Define anatomy and physiology. -anatomy is the science of the structure and relationship of the structures. -physiology is the science of body functions (dhow it works)
Describe the six levels of structural organization and give examples of each. Chemical - atoms and molecules Cellular - molecules combine to form cells(basic structure and unit of an organism) Tissue - group of cells and materials (epithelial tissue, connective tissue, muscle tissue, and nervous tissue) Organ - composed of 2 or more types of tissues(skin, bones, stomach, heart, liver, lungs, and brain) System - consists of related organs that have common function(digestive system) Organism - a single living person or thing
Define metabolism, homeostasis, and interstitial fluid. Metabolism - change of one form of energy into another(sum of all the chemi- cal processes that occur in the body.) Anabolism - building up Catabolism - breaking down Homeostasis - maintenance of relatively stable conditions in the body’s internal environment(body remains normal and stable) Interstitial fluid - extracellular fluid that fills the narrow spaces between cells of tissues(cells communicate with one another)
Explain how feedback systems maintain homeostasis in the human body; distinguish between positive and negative feedback systems. -Disturbances from the outside environment can causes the body to respond quickly to restore balance in the internal environment. -Feedback system is a cycle of events in which the status of a body condition is continually monitored, evaluated, changed, remonitored, reevaluated, and so on -Positive feedback system - response strengthens or reinforces the change in one of the body’s controlled conditions rather than re- versing it. (child birth) -Negative