1. Human Body Organization & Homeostasis
Gaiser Life Science

2. Human Body Organization and Homeostasis
Know
List all the body systems you know. (There are 11.)
“I don’t know any.” is not an acceptable answer.
Use complete sentences.
Evidence
After listening to the PowerPoint lecture, come back here and list evidence to explain why your answer to the above question is or is not a good answer. You may also use other outside sources to help you respond.
Page 50

3. Human Body Organization and Homeostasis
Information
Clarifying ?s
Organization levels of the human body
1. Cells
2. Tissues
3. Organs
4. Organ systems
tissues
- similar cells that perform the same function
A. Muscle tissue:
4 types of tissue
1. Assists the body parts to move
Example: biceps and gastrocnemis
2. Moves blood through the heart
Example: heart muscle
3. Assists the body in carrying out digestion
Example: esophagus
B. Nerve tissue
1. Brings messages to the central nervous system
2. Sends messages to the muscle system
Example: Brain, spinal, and peripheral nerves
Page 51

4. Human Body Organization and Homeostasis
Information
Clarifying ?s
C. Connective tissue
surrounds, supports, and connects organs, muscles, joints, and other body parts
Example: collagen fibroblasts and fat cells
D. Epithelial tissue
Covers body surfaces and allows food and water to selectively go through it
Example: skin and digestive lining
- a structure composed of different kinds of tissue which performs a specific job
organ
Example: The heart contains all four types of tissue; its job is to pump blood.
Page 52

5. Human Body Organization and Homeostasis
Information
Clarifying ?s
- a group of organs working together
organ system
Example: The stomach, small intestine, and large intestine are all part of the digestive system.
- the body’s internal balance to keep it stable despite external changes
homeostasis
Example: The body temperature stays at 37˚C even if the outside temperature drops well below 0˚C.
- the reaction to threats, challenges, or disturbing events by the body and brain
stress
Physical response - fast heartbeat, fast breathing, and sweating
Long term problems - tired, irritable, high blood pressure
Dealing with stress - Exercise! Ask for help. Deal with it - don’t ignore it
Summary:
Page 53

7. Human Body Organization and Homeostasis
Information
Clarifying ?s
Organization levels of the human body
1. Cells
2. Tissues
3. Organs
4. Organ systems
tissues
- similar cells that perform the same function
A. Muscle tissue:
3 types of connective tissue
1. Assists the body parts to move
Example: biceps and gastrocnemis
2. Moves blood through the heart
Example: heart valves
3. Assists the body in carrying out digestion
Example: esophagus
B. Nerve tissue
1. Brings messages to the central nervous system
2. Sends messages to the muscle system
Example: Brain, spinal, and peripheral nerves
C. Connective tissue
surrounds, supports, and connects organs, muscles, joints, and other body parts
Example: collagen fibroblasts and fat cells
D. Epithelial tissue
Covers body surfaces and allows food and water to selectively go through it
Example: skin and digestive lining

8. Human Body Organization and Homeostasis
Information
Clarifying ?s
- a structure composed of different kinds of tissue which performs a specific job
organ
Example: The heart contains all three types of tissue; its job is to pump blood.
- a group of organs working together
Organ system
Example: The stomach, small intestine, and large intestine are all part of the digestive system.
- the body’s internal balance to keep it stable despite external changes
homeostasis
Example: The body temperature stays at 37˚ even if the outside temperature drops well below 0˚.
- the reaction to threats, challenges, or disturbing events by the body and brain
stress
Physical response - fast heartbeat, fast breathing, and sweating
Long term problems - tired, irritable, high blood pressure
Dealing with stress - Exercise! Ask for help. Deal with it - don’t ignore it
Summary:

9. This PowerPoint was created from Charlene Shea’s lecture notes by Tim Paterek. It is copyrighted and may not be reproduced outside the Vancouver School District. All pictures came from Google Image Search. To fall within the Fair Use Guidelines, this PowerPoint must be used within the confines of the classroom and may not be published back onto the Internet unless the pictures are removed.