1. Organ Systems and Homeostasis
The Human Body!

2. Cells…Tissues…Organs…Systems
Cells: Basic unit of structure and function—keeps organisms alive
Tissues: Group of specialized cells that perform the same function—what are the 4 types?

3. 4 Types of Tissue Connective: Connects all parts of body
Epithelial: Surfaces of body inside and out
Muscle: Makes parts of the body move
Nervous: Controls messages between brain & parts of body

4. TissuesOrgansOrgan Systems
What are organs?
….made up of tissues that do a specific job!

5. Organ Systems What is an organ system? There are 11 in the human body
Group of organs that work together to perform a major function
There are 11 in the human body
ISM are the first 3!
1. Integumentary: (P511) skin, hair and nails
Function: provides a barrier and protection
2. Skeletal: (P 519) bones, cartilage, ligaments, tendons
Function: Provides support and protection, minerals, blood cells
3. Muscular: (P 527) muscles
Function: Pulls on the skeleton to provide movement

6. What are these 3 organ systems?

7. The next 6 organ systems
4. Circulatory: (P 512): tube like vessels throughout body provides a transportation network
Function: carries food and oxygen to all the cells
5. Respiratory (P 512): lungs, nose, pharynx, larynx, trachea, bronchi, bronchioles, lungs
Function: takes in oxygen and disposes of carbon dioxide
6. Digestive System (P 512): mouth, pharynx, esophagus, stomach, small and large intestines, rectum, liver, pancreas
Function: breaks down food into small molecules the body can use

8. 7. Excretory System: (P512): kidney, ureter, urinary bladder, urethra
Function: removes waste from the breakdown of materials in the bloodstream
8. Immune System: (P568): specialized white blood cells
Function: destroys disease-causing bacteria and viruses
9. Reproductive: male males-testes, epididymis, vas deferens, urethra, and penis; Females-Ovaries, Fallopian tubes uterus, vagina
Function: contains organs that produce sex cells and produce chemicals that regulate physical development of maturing bodies.

9. C, R, D, E, I, R: These 6 carry out the processes of life.

10. Last 2 are Nervous and Endocrine
These two provide control over body processes.

11. 10. Nervous: Brain, spinal cord, peripheral nerves, (senses: sight, hearing, touch, smell, taste)
Functions: Recognizes and coordinates the body’s responses to changes in its internal and external environments
11. Endocrine: Glands- Hypothalamus, pituitary, pineal, thyroid, parathyroid, adrenals pancreas, ovaries (females), testes (males)
Function: Controls growth, development, and metabolism, maintains homeostasis

12. I, S, M, C, R, D, E, I, R, N, E
I, S, M, C, R, D, E, I, R, N, E
ISM (I See My)
CRDEIR (Cat Running Delightfully Except In Rooms)
NE (Not Empty)

13. Homeostasis
All of the body systems work together to maintain homeostasis!
The process by which an organism’s internal environment is kept stable in spite of changes in the external environment.
What are examples?
Why is this important?