Presentation on theme: "Introduction to Human Anatomy and Physiology Chapter 1"— Presentation transcript:
1Introduction to Human Anatomy and Physiology Chapter 1 Objectives:Define anatomy and physiology, and explain how they are related.List and describe major characteristics of life.List and describe major requirements of organisms.Define homeostasis.Explain biological levels of organization.Describe the locations of the major body cavities.Use appropriate terminology to describe relative positions, body sections, and body regions.
2Anatomical Position:Def: the body is standing erect, facing forward, with upper limbs at the sides, palms forward.
3Anatomy & PhysiologyAnatomy: deals with the form and structure (morphology) of body parts – their forms and how they are organizedPhysiology: the study of the functions of body partsDifficult to separate the two because the functions of body parts are so dependent on the structure.
4Characteristics of life These are processes that occur in living organisms and are evidence of life.
5Metabolism:Def: all chemical changes within the cell considered togetherINCLUDES:Acquisition of food (digestion, absorption, assimilation, circulation)Utilization of the food’s energy (movement, responsiveness, growth, reproduction, respiration)Excretion
6Requirements of Organisms for Life WaterFoodOxygenHeatPressureVital signsTo verify the presence or absence of life, medical personnel refer to vital signs. What are these? Why are they called vital signs?
7Homeostasis:Def: the maintaining of the body’s internal environment within the normal rangeThree parts to all homeostatic mechanisms (or control systems):Receptors – gather and supply information about specific conditions in the bodySet point – tells what a particular value should be (i.e., normal temperature or blood pressure?)Effectors – cause responses that alter conditions in the internal environment
8Fig. 1.3Draw this diagram on the sheet of colored paper provided. Make this diagram full-page so you can add notes to each step.We will use our air conditioning system as an example of a homeostatic system. What would the stimulus be that makes the air conditioner need to come on?
14Homeostasis (cont.)What makes the air conditioner shut off and not make the room too cold?Review temperature homeostasis (p.7)Exit Slip: Using Figure 1.3 from your notes (or on page 5), describe how one of the following homeostatic mechanisms would work:Blood pressureOxygen levelsHeart rate