1. The Human Body Systems

2. Digestive System Functions Takes in food
Digests food into smaller molecules
Absorbs nutrients
Removes undigested food

3. Digestive System Major Organs Mouth Pharynx Esophagus Stomach
Small intestine
Large intestine
Rectum
Anus
Accessory Organs
Salivary glands
Pancreas
Liver
Gall bladder

4. INTERACTIONS WITH OTHER SYSTEMS
Digestive System
INTERACTIONS WITH OTHER SYSTEMS
Circulatory: absorbs and delivers digested nutrients to the cells
Muscular: controls contractions of the digestive organs to pass food along
Nervous: brain maintains homeostasis by triggering your appetite

5. Circulatory System Functions
Transports materials throughout the body, such as:
-Water
-Oxygen
-Nutrients
-Waste

6. Circulatory System Major Organs Heart Veins Arteries Capillaries
Red blood cells

7. INTERACTIONS WITH OTHER SYSTEMS
Circulatory System
INTERACTIONS WITH OTHER SYSTEMS
Respiratory: delivers O2 from lungs to cells and CO2 from cells to lungs
Digestive: absorbs and delivers digested nutrients to cells
Excretory: kidneys filter cell waste from the blood

8. Circulatory System
Lymphatic: helps transport substances to and from the cells
Immune: transports white blood cells to fight infection
Nervous: supplies blood to the brain to control heartbeat
Endocrine: transports hormones

9. Nervous System Functions Receives and interprets information
Responds to information
Maintains homeostasis
Stimulates muscles for movement

10. Nervous System Major Organs Brain Spinal Cord Nerves
Nerve cell (called neurons)
Hypothalamus

11. INTERACTIONS WITH OTHER SYSTEMS
Nervous System
INTERACTIONS WITH OTHER SYSTEMS
The nervous system controls ALL other systems
Hypothalamus: maintains homeostasis

12. Excretory System Functions
Removes waste from cells that was produced by cell metabolism
-urine
-water
-CO2
Filters blood

13. Excretory System Major Organs Kidneys Ureters Bladder Urethra Lungs
Skin (sweat glands)
Liver

14. INTERACTIONS WITH OTHER SYSTEMS
Excretory System
INTERACTIONS WITH OTHER SYSTEMS
Circulatory: filters waste out of blood
Lungs: removes CO2 waste
Integumentary: removes excretory waste

15. Respiratory System Functions Supplies blood with oxygen
Removes carbon dioxide waste
Removes water

16. Respiratory System Major Organs Nose Trachea Bronchi Broncioles
Alevoli
Lungs

17. INTERACTIONS WITH OTHER SYSTEMS
Respiratory System
INTERACTIONS WITH OTHER SYSTEMS
Circulatory: takes in oxygen and delivers it to cells; removes carbon dioxide
Excretory: removes excretory waste
Nervous: controls breathing
Muscular: diaphragm controls breathing

18. Skeletal System Functions Protects organs Provides shape and support
Stores materials (fats and minerals)
Produces blood cells
Allows movement

19. Skeletal System Major Organs Bones Cartilage Ligaments
*not tendons because they are part of the muscular system

20. INTERACTIONS WITH OTHER SYSTEMS
Skeletal System
INTERACTIONS WITH OTHER SYSTEMS
Muscular: allows movement
Circulatory: produces blood cells
Immune: produces white blood cells
Circulatory/Respiratory: protects softer organs

21. Muscular System Functions
Allows for movement of bones and body by contractions

22. Muscular System Major Organs Cardiac Muscles (involuntary)
Smooth Muscles (involuntary)
Skeletal Muscles (voluntary)

23. INTERACTIONS WITH OTHER SYSTEMS
Muscular System
INTERACTIONS WITH OTHER SYSTEMS
Skeletal: allows movement
Digestive: allows organs to push food through the pathway
Respiratory: diaphragm controls breathing
Circulatory: controls pumping of blood
Nervous: controls all muscle contractions

24. Endocrine System
Functions
1. Regulates body activities using hormones

25. Endocrine System Major Organs Glands that produce hormones:
Hypothalamus
Pituitary gland
Thyroid gland
Thymus
Adrenal gland
Pancreas

26. INTERACTIONS WITH OTHER SYSTEMS
Endocrine System
INTERACTIONS WITH OTHER SYSTEMS
Circulatory: transports hormones
Nervous: maintains homeostasis and releases hormones
Reproductive: controls hormone release
Skeletal: controls growth of bones

27. Immune System Functions
1. Uses white blood cells to fight off foreign invaders (infections)

28. Immune System Major Organs White blood cells -T cells -B cells
-Macrophages
Skin
Spleen

29. INTERACTIONS WITH OTHER SYSTEMS
Immune System
INTERACTIONS WITH OTHER SYSTEMS
Circulatory: transports WBC’s
Lymphatic: produces WBCs to fight infections; spleen filters blood
Skeletal: makes white blood cells
Integumentary: prevents foreign matter from getting into the body

30. Integumentary System Functions Barrier against infection
Helps regulate body temperature
Removes waste
Protects from UV rays
Produces vitamin D

31. Integumentary System Major Organs Skin (epidermis/dermis) Sweat glands
Sebaceous glands
Hair follicles
Blood vessels
Nerves

32. Integumentary System Excretory: removes cellular waste
INTERACTIONS WITH OTHER SYSTEMS
Excretory: removes cellular waste
Nervous: controls body temperature
Immune: prevents pathogens from entering the body

33. Lymphatic System Functions
Stores and carries white blood cells that fight disease
Collects excess fluid and returns it to the blood (fluid drainage system)

34. Lymphatic System Major Organs Lymph (liquid part of the blood)
Lymph vessels
Lymph nodes
White Blood Cells

35. INTERACTIONS WITH OTHER SYSTEMS
Lymphatic System
INTERACTIONS WITH OTHER SYSTEMS
Immune: holds lots of white blood cells
Circulatory: transports materials to and from the cells