The document outlines the major human body systems, including their roles and main organs. The circulatory system transports substances throughout the body. The excretory system filters wastes from the blood and maintains nutrient balances. The digestive system breaks down macromolecules and absorbs nutrients using organs like the stomach, liver, and intestines. Other systems described are the reproductive, skeletal, muscular, nervous, integumentary, endocrine, lymphatic, and respiratory systems.

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