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1. Introduction to Human
Body Systems

2. Circulatory system
► Role: Transports
substances throughout
the body
► Circulates oxygen, CO2
heat, water, nutrients,
wastes
► Major organs: Heart,
Arteries, Veins

3. Excretory System
► Role: Filters wastes
from blood; maintains
bodies internal nutrient
balances
► Also rids body of
wastes via urethra
► Major organs: Kidneys,
Urethra, Bladder

4. Digestive System
► Role: Breaks down
macromolecules and
absorbs necessary
nutrients
► Major organs:
Stomach, L.I., S.I.
► Liver serves multiple
functions for multiple
systems (but is
considered part of
DS)

5. Reproductive System
► Role: Producing
offspring; regulating
sexual characteristics
► Major organs: Testes,
Uterus, Ovaries

6. Skeletal System
► Provides body
structure and support
► Bone marrow creates
new blood cells for
circulation;also stores
lipids
► Major organs: bones,
cartilage

7. Muscular System
► Role: allows for
movement
► Major organs: skeletal
muscle

8. Nervous System
► Control system of body
► Major organs: Brain,
Spinal cord, nerves
► Stimulates heart rate
and controls blood
oxygen levels

9. Integumentary System
► Role: Protects body;
transfer of heat;
sensory reception
► Major organs: skin,
nails
► Releases sweat, and
heat from blood, to
help control body
temperature

10. Endocrine System
► Role: Circulates
hormones around the
body to control body
functions; maintains
homeostasis
► Major organs: Pituitary,
Thyroid, Adrenals,
Pancreas,hypothalmus

11. Lymphatic System
► Role: Works to help
maintain ciculatory
system as well as
housing cells
responsible for
immunity
► Major organs: Lymph
nodes

12. Respiratory System
► Ventilation system for
body
► Major organs: lungs,
diaphragm, trachea
► Takes in oxygen and
releases carbon
dioxide from blood