The Human Body: An Orientation Chapter 1 The Human Body: An Orientation
As in a good essay: Introduce the topics discussed, or objectives Provide pictures/links to different sections of the unit/notes
Anatomy and Physiology are closely intertwined
Anatomy can be studied at two levels Large structures Easily observed Gross Anatomy Tiny structures Requires a microscope Microscopic Anatomy
Structures of the human body are organized on several levels
Stop and Think! What is the basic difference between anatomy and physiology? Name a body part. Explain how its structure is related to its function. Within your group, list the seven levels of human organization from simplest to most complex. The first person will write the simplest level and pass it to the left. The next person will write the next level of organization. Continue until all seven levels have been listed in order.
The 11 body systems must work together to maintain human life Integumentary system Skeletal system Muscular system Nervous system Endocrine system Cardiovascular system Lymphatic system Respiratory system Digestive system Urinary system Male/Female Reproductive systems
Integumentary System
Skeletal System
Muscular System
Nervous System
Endocrine System
Cardiovascular System
Lymphatic System
Respiratory System
Digestive System
Urinary System
Reproductive Systems
Ask a question or conduct an activity about the 11 body systems
All organ systems must work together to perform 8 Necessary Life Functions
Homeostasis: Maintaining stable conditions when changes occur inside and outside the body
For example: Glucose in the blood is maintained within a narrow range
Homeostatic control mechanisms are in place to enable organs to dynamically maintain homeostasis.
Homeostatic Control Mechanisms: In general, when homeostasis is disrupted by some stimulus… Variable in Homeostasis Variable in Homeostasis Variable in Imbalance Variable in Imbalances
Variable in Homeostasis Communication among three relative components helps return the body to homeostatic conditions. Control Center Receptor (Sensor) Effector Variable in Homeostasis Variable in Imbalance Variable in Imbalance
Body Temperature in Homeostasis Body Temperature Drops Negative Feedback systems shut off the stimulus or reduce its intensity. Hypothalamus in brain Skeletal muscles Thermoreceptors in skin Cause Shivering Body Temperature in Homeostasis Body Temperature Drops
Positive Feedback systems intensify the stimulus (for events that don’t happen often) Control Center Receptor (Sensor) Effector Variable Intensified Variable in Imbalance Variable in Imbalance