1. How are they organized?
2.1 Cells & Cell Systems

2. Cell Organization Groups of organs that have related function Systems
Groups of different tissues put together for at least one function
Organs
Tissues
Group of cells that are similar in shape and function
Cells

3. Cell and Tissue types

4. Epithelial tissue Covers the outside surfaces of your body.
Covers the inside of your body.
Serves as membranes lining organs.
Separates organs and keeps them in place.
Skin, inside of mouth, stomach, tissue surrounding the body’s organs.

5. Connective tissue Adds support to the body Adds structure to the body
Contains fibrous strands – collagen
Skin, tendons, ligaments, cartilage, bone and fat tissue.
Blood is considered a connective tissue.

6. Muscle tissue
Muscle is a specialized tissue because it can contract.

7. Nerve tissue Can generate and conduct electrical signals.
Managed by nerve tissue in brain.
Transmitted down spinal cord.

8. Organs

9. ORgans The next level of organization in the body
An organ contains at least two different types of tissue functioning together for a common purpose.
Liver, kidneys, heart, lungs, skin
Skin – 3 layers 1) epidermis 2) dermis 3) subcutaneous layer

10. Respiratory system Major Role Major Organs
Provide gas exchange between blood and environment.
Oxygen is absorbed from atmosphere.
Carbon dioxide is expelled from body.
Major Organs
Nose.
Trachea
Lungs

11. Circulatory system Major Role Major Organs
Transport nutrients, gases (O2, CO2), hormones, waste
Major Organs
Heart, blood vessels, blood

12. Excretory system Major Role Major Organs
Filter out wastes, toxins, excess water, nutrients from circulatory system.
Major Organs
Kidneys, urteters, bladder, urethra

13. Major Role Digestive system Major Organs Breakdown nutrients
Absorb nutrients
Major Organs
Mouth
Esophagus
Stomach
Small intestine
Large intestine

14. Nervous system Major Role Major Organs
Relay electrical signals throughout the body
Directs behavior and movement
Controls digestion, circulation
Major Organs
Brain
Spinal cord
Peripheral nerves

15. Endocrine system Major Role Major Organs
Relay chemical messages through the body
Works with nervous system to control nutrient absorption growth etc.
Major Organs
Hypothalamus
Pituitary
Thyroid
Pancreas
Adrenal glands

16. Major Role Reproductive system Major Organs
Manufacture cells for reproduction
In male – sperm
In female - eggs
Major Organs
Male – testes, seminal vesicles and penis
Female – ovaries, oviducts, uterus, vagina and mammary glands.

17. Muscular system Major Role Major Organs Provide movement Work in pairs
Provide movement in organs, stomach, intestine, heart, circulatory system.
Major Organs
Skeletal muscles throughout body
Smooth muscles throughout body

18. Lymphatic / immune system
Major Role
Destroy and remove invading microbes and viruses.
Remove fat and excess fluids from blood.
Major Organs
Lymph
Lymph nodes and vessels
White blood cells
T cells
B cells

19. Skeletal system Major Role Major Organs Provide support for the body
Protect delicate internal organs
Provide attachment sites for organs
Major Organs
Bones
Cartilage
Tendons
Ligaments

20. Questions
Define; tissue, organ, organ system. Give an example of each.
Organize the following structures from smallest to largest and give an example: tissue, cell, organ, molecule
Make a table to compare the levels of cell organization (pg 42) with the levels in some organization that you are familiar with such as:
sports team
RPG
The school system
Government system
Banking system
Family tree of authority
Police structure of authority
Science Probe 8 - pg 42