1. Interdependence in Living Systems

2. Any group of parts that work together as a unit.
Systems
Any group of parts that work together as a unit.

3. How the body is organized:
Cells – First level of organization; the basic unit of structure and function.
Tissues – a group of cells that perform the same function.

4. Types of Tissues
Muscle
Connective
Nerve
Epithelial

5. A group of tissues that perform a specific function.
Organs
A group of tissues that perform a specific function.

6. A group of organs that work together to perform a specific function.
Organ Systems
A group of organs that work together to perform a specific function.

7. Interactions Within the Human Body
Each organ system is dependent on other body systems.

8. Main components – BRAIN, SPINAL CORD, AND NERVES
Nervous System
Obtains and processes information from the body’s internal and external environment; directs most body functions.
Main components – BRAIN, SPINAL CORD, AND NERVES

9. Cardiovascular System
Transports needed materials to body cells; removes wastes (main components – HEART, ARTERIES, VEINS)

10. Digestive System
Breaks down food and absorbs the broken-down materials (main components – LIVER, STOMACH, GALL BLADDER, SMALL INTESTINE, AND LARGE INTESTINE)

11. Respiratory System
Gets oxygen into the body; removes carbon dioxide. (Main component – TRACHEA, LUNGS, AND DIAPHRAGM)

12. Enables the body to move
Muscular System
Enables the body to move

13. Skeletal System
Supports and protects the body; works with muscles to enable movement processes

14. Endocrine System
Produces chemicals called hormones that help control many body processes (Main components – GLANDS, PANCREAS, AND KIDNEYS THAT PRODUCE HORMONES)

15. Excretory System
Removes wastes; helps regulate water in the body (Main component – KIDNEY)

16. Immune System
Fights Disease (Main components – LIVER, LYMPH NODES, WHITE BLOOD CELLS, BLOOD, AND THYMUS)

17. Skin (Integumentary) System
Protects the body, keeps water inside, and helps sense the external environment

18. Reproductive System
Create offspring, determines male and female characteristics (Main Components – OVARIES and TESTES)

19. Interactions in TRANSPORTING OXYGEN
RESPIRATORY – delivery of oxygen and removal of carbon dioxide.
Trachea – tube connecting to the lungs
Alveoli –round sacs in the lungs
Moves oxygen from air to blood
Moves carbon dioxide from blood to air
CARDIOVASCULAR – carries oxygen from lungs to bloodstream
MUSCULAR – enables air to enter lungs
Diaphragm – dome shaped muscle

20. Interactions in DIGESTING FOOD
DIGESTIVE – breaks down food into simpler substances to be used by body cells
Mouth and Stomach – begins to break down food
Small Intestine – Completes the breakdown of food and absorbs the nutrients (through villi)
Large Intestine – undigested food passes out of the body as waste

21. Interactions in DIGESTING FOOD
MUSCULAR – moves jaws to break down food.
Absorption of nutrients
Enables you to swallow food
Within the stomach – food is churned and squeezed, broken down into smaller particles

22. Interactions in DIGESTING FOOD
CARDIOVASCULAR – carries nutrients absorbed through the small intestine to the blood.
Nutrients are carried throughout the body.

23. MOVEMENTS: MUSCLES, BONES, AND NERVES
MUSCULAR – produce movement by contracting or shortening
SKELETAL – muscles attached to bones move your body
NERVOUS – involved in movement. Brain and nerves direct muscles to contract.
CARDIOVASCULAR – circulates oxygen and food to cells
RESPIRATORY – brings oxygen into body, removes carbon dioxide
DIGESTIVE – processes food for delivery to cells