1. Organ Systems

2. Levels of Organization
Plants and Animals are both classified as multicellular organisms – composed of multiple cell types that all work together to allow the organism to function properly.
The levels of organization within multicellular organisms are: (from simplest to most complex)
Simplest
Most Complex

3. Cells Cells are the basic units of life!
You have about 200 different types of cells that make up the trillions inside you.
Each different type of cell must work with each of the other types to allow an organism to grow, develop, repair, reproduce and remain healthy.

4. Cells & Their Functions
Plant Cells
Animal Cells
Red blood cells – carry oxygen
White blood cells – fight disease & infection
Neuron – carry electrical messages
Xylem – moves water
Phloem – moves nutrients
Parenchyma– regulates water loss.
Sclerenchyma – protection & support.
Collenchyma – photosynthesis & support.

5. Cells Working Together
Cells of the same kind and work to do the same job create Tissue.
Plant Tissues:
Vascular Tissue = xylem & phloem
Ground Tissue – parenchyma, collenchyma & sclerenchyma cells
Dermal Tissue – Parenchyma & sclerenchyma cells
Animal Tissues:
Connective Tissue – bone, fat & blood
Nervous Tissue – neurons
Smooth Muscle
Blood Tissue – red and white blood cells, platelets & plasma

6. Tissues Working Together
Groups of similar tissues that work together to perform a job create Organs.
Plant Organs
Organ
Tissues
Leaf
Epidermis & vascular systems
Flower
Stem
Roots

7. Tissues Working Together
Groups of similar tissues that work together to perform a job create Organs.
Organ
Tissues
Lungs
Connective tissue, muscular tissue & nervous tissue
Heart
Muscular tissue, connective tissue & nervous tissue
Stomach
Intestines
Human Organs
Lungs
Brain
Ears
Liver
Heart
Pancreas
Stomach
Large
Intestine
Kidneys
Bladder
Small Intestine

8. Organs Working Together
Organs working together to perform a set of related tasks create Organ Systems.
Shoot System
Root System

9. Organ System Functions - Plants
Shoot System Functions
Root System Function
Photosynthesis
Reproduction
Storage
Transport
Hormones
Anchorage
Absorption
Storage
Transport
Hormones
Shoot
System
Root
System

10. Human Organ Systems
Excretory
Immune

11. Organ System Functions - Human
Protects and supports the body.
Supports the body and enables it to move.
Receives, breaks down, transports and absorbs food throughout the body.
Carries needed substances to the cells of the body while carrying waste products away from the cells.
Brings oxygen into and removes carbon dioxide from the body.
Skeletal System
Muscular System
Digestive System
Circulatory System
Respiratory System

12. Organ System Functions - Human
Collects and removes waste products from the body.
Communicates information throughout the body and controls the body’s response to stimuli.
Produces chemical messengers, hormones, that help to regulate and control many of the body’s internal functions.
The body’s defense system against disease causing organisms.
Produces new individuals of the same type.
Excretory System
Nervous System
Endocrine System
Immune System
Reproductive System

13. Organ Systems Working Together
Organ systems working together to perform all the basic functions of life create an Organism.
Human
Plant