1. Introduction to The Human Body
Human Body Systems
Introduction to
The Human
Body

2. Introduction Purpose of human body systems Maintain homeostasis
Process of maintaining a specific, stable and constant environment
Your body has very specific parameters that it maintains
Do this by many different tasks
Nutrient supply
Waste removal
Filtering
Many more

3. Introduction Levels of organization in the human body Cells Tissues
Organs
Organ systems
Organism

4. Organ Systems There are 12 organ systems in a human body Nervous
Integumentary
Respiratory
Digestive
Excretory
Skeletal
Muscular
Circulatory
Endocrine
Reproductive
Immune/Lymphatic- Sometimes considered two different systems

5. Levels of Organization
Cell: Basic unit of BOTH structure and function
Humans are collections of specialized cells that work together
Specialized cells develop from a single zygote
Differentiate into 200 different types

6. Levels of Organization
Differentiation: the process by which committed cells acquire the structures and functions of highly specialized cells
How?
Specific genes in each cell are turned on and off

7. Tissue A group of cells put together to perform a specific function
4 types
Epithelial- covers both interior and exterior parts of your body
Connective tissue- provides support for the body and connects its parts
Nervous- transmits nerve impulses throughout the body (for movement, and other controlled interactions)
Muscle tissue- enables the body to move, along with other various functions

8. Organs
A group of different types of tissues that work together to perform a specific function
Ex. Eye is made up of muscle, nerve, epithelial, and connective tissue
They all combine to enable us to see

9. Organ Systems
Is a group of organs that perform closely related functions.
Ex. Brain is one part of the entire nervous system

10. Maintaining Homeostasis
All of these work together to perform one main function
Homeostasis
Process by which organisms keep internal conditions relatively constant despite changes in the world around them.
Ex. Thermostat in your house.
All systems are REQUIRED in order to make homeostasis work correctly.

11. Our focus We will focus mainly on these systems Respiratory
Circulatory
Nervous
Immune
Digestive
Muscle?
Skeletal?
Integumentary?

12. Now, onto Homeostasis Chart

13. Homeostasis
Below Set Point
Homeostasis
Above Set Point

14. Homeostasis –Body Temperature
Below Set Point
Homestasis/
Set Point
Above Set Point

15. Homeostasis – Respiration Rate
Below Set Point
Homeostasis/
Set Point
Above Set Point

16. Homeostasis – Water Level
Below Set Level
Homeostasis/
Set Level
Above Set Level

17. Homeostasis: Blood Glucose
Below Set Point
Homeostasis/
Set Point
Above Set Point