human body

1. Human Body Systems

2. Muscular System
Functions:
 Helps you move
 Provides stability (balance)
 Protects body & organs
 Regulates body temperature
Major parts/organs:
 Skeletal muscles
 Smooth muscles
 Cardiac muscles

3. Muscular System
Interactions:
 Works with bones to help you move
 Works with digestive system organs to
help move food along
 Works with circulatory system to help
heart pump blood
Maintaining Homeostasis:
 Helps regulate body temp. (shivering)
 Pumping heart faster when more
oxygen is needed

4. Skeletal System
Functions:
 Provides support
 Helps you move
 Protects internal organs
 Produces blood cells & stores fat &
calcium
Major parts/organs:
 Compact & spongy bone tissue
 Bone marrow
 Cartilage

5. Skeletal System
Interactions:
 Works with muscles to help you move
 Supplies blood cells for circulatory
system
Maintaining Homeostasis:
 Supplies calcium to your nerves,
muscles, and heart

6. Digestive System
Functions:
 Ingesting food (eating)
 Digesting food – breaking it down into
nutrients
 Absorbing nutrients
 Getting rid of wastes
Major parts/organs:
 Mouth, esophagus, stomach, small
intestines, large intestines

7. Digestive System
Interactions:
 Works with muscular system to move
food through the body
 Works with the excretory system to
get rid of wastes
Maintaining Homeostasis:
 Provides nutrients that are carried by
the circulatory system (blood)
throughout the body, which provides
energy

8. Excretory System
Functions:
 Collecting & eliminating wastes
 Regulating the level of fluid in the
body
Major parts/organs:
 Kidneys
 Ureters
 Urethra
 Bladder

9. Excretory System
Interactions:
 Works with nervous system to
regulate fluid levels in body
 Works with digestive system to get rid
of wastes
 Works with circulatory system to
regulate blood pressure
Maintaining Homeostasis:
 Filters waste from the blood
 Removes wastes from digestive
system

10. Respiratory System
Functions:
 Taking in oxygen
 Eliminating carbon dioxide
Major parts/organs:
 Pharynx
 Larynx & trachea
 Bronchi & lungs
 Alveoli

11. Respiratory System
Interactions:
 Works with muscular system to help
you breathe
Maintaining Homeostasis:
 Works with circulatory system to bring
oxygen to cells & get rid of carbon
dioxide

12. Circulatory System
Functions:
 Carries food, water, oxygen, & other
materials to your body’s cells
 Carries away waste materials
Major parts/organs:
 Heart
 Blood vessels: arteries, veins,
capillaries

13. Circulatory System
Interactions:
 Works with respiratory system to
transport oxygen to cells
 Works with digestive system to
transport nutrients
 Transports hormones from the
endocrine system
Maintaining Homeostasis:
 Works with nervous system to
regulate heartbeat

14. Lymphatic System
Functions:
 Absorbs tissue fluid from around cells
 Absorbs fats & transports them to blood
(circulatory system)
 Filters dead cells, viruses, bacteria, & other
unneeded particles
 Helps fight off illness & infections
Major parts/organs:
 Lymph, lymph vessels, lymph nodes
 Bone marrow, thymus, spleen, tonsils

15. Lymphatic System
Interactions:
 Works with circulatory system to clean
fluids & replace them in the
bloodstream
 Works with digestive system to absorb
& transport fats
Maintaining Homeostasis:
 Helps regulate fluid buildup around
cells

16. Nervous System
Functions:
 Gathers information from senses
 Responds to stimuli (change in internal or
external environment)
 Maintains homeostasis
Major parts/organs:
 Neurons (nerve cells)
 Central nervous system: brain & spinal cord
 Peripheral nervous system

17. Nervous System
Interactions:
 Works with muscles to move
 Works with circulatory system to
regulate heartbeat
 Works with respiratory system to
breathe
Maintaining Homeostasis:
 Senses changes in environment &
responds by sending signals to other
systems

18. Reproductive System
Functions:
 Male: produce sperm cells
 Female: produce egg cells & to nourish
& protect the developing human (fetus)
Major parts/organs:
 Male: testis, penis, sperm
 Female: ovary, egg, vagina, uterus

19. Reproductive System
Interactions:
 Works with endocrine system to
control menstrual cycle, sperm
production, and childbirth
Maintaining Homeostasis:
 Does not help the body to maintain
homeostasis