Transcript Organ Systems and Homeostasis

Organ Systems and Homeostasis
PH 508-517
Previously in life science…
• You learned that cells are the basic building
blocks of living things. Now, you will learn
how those cells are organized in levels to
create a whole organism.
• Do you remember the function of
the nucleus?
A. the nucleus directs the cell’s activities!
B. Do you remember the function
of the cell membrane?
B. the membrane forms outside boundary of
the cell!
1. Identify the levels of organization
in the body.
Simple
1.
2.
3.
4.
5.
Cells
Tissues
Organs
Organ Systems
Whole Organism
Complex
2. What is a cell?
• The basic unit of structure and function in
living things
3. What is a tissue?
• The “thing” you use to blow your nose!!!
• A group of cells that perform the same
function
4. What are the 4 basic tissue types?
1. Muscle tissue – can shorten to make you
move
ex: muscle & heart
2. Nerve tissue – carry messages throughout
body
ex: brain & spinal cord
3. Connective tissue – supports and connects
the body
ex: blood, fat, bones
4. Epithelial tissue – covers surfaces of body
ex: skin & internal organs
• What is the job of muscle tissue?
To make parts of the body move
5. What are organs?
• A group of tissues that perform a function.
ex: stomach, heart, brain, lungs
6. What are organ systems?
• A group of organs that
work together to perform a
major function
7. What are the major organ systems
of the body?
Movement:
• Integumentary
• Skeletal
• Muscular
Life Processes:
• Circulatory
• Respiratory
• Digestive
• Excretory
• Immune
• Reproductive
Control:
• Nervous
• Endocrine
8. Why do organ systems
work/function?
• Because of the contributions of the
individual organs, tissues, and cells!
9. What happens if part of an organ
system fails?
• Failure of any part can affect the entire
system, potentially causing organ system
failure
• Example: heart attack
10. What is homeostasis?
• The process by which an organism's internal
environment is kept stable despite changes
in the external environment.
• Ex: body temperature!
What did you learn today?
• You learned how cells are organized in
levels to create a whole organism: cells,
tissue, organ, organ system.
Tissue Observations
1. Fold paper into
fourths
2. Create 2 circles
3. Label top half
“blood”
4. Label bottom
half “nerve”
Tissue Observations
blood
_______
_______
_______
nerve
_______
_______
_______
Blood
Nerve Tissue