1. Human Organ Systems

2. Levels of Organization

3. Cardiovascular System
Primary Organs: heart,
arteries, veins, capillaries
Primary Functions:
blood transports gases, water,
nutrients, wastes, hormones,
wbc, etc, to and from cells
where exchanges are made
Circulatory System

4. Digestive System Primary Organs: mouth, esophagus, stomach, sm &
lg intestine, rectum, liver,
pancreas, gall bladder
Primary Functions: digest
food into small products
so can be absorbed by
blood, remove waste
materials, reclaim water
Digestive system

5. Endocrine System Primary Organs: glands Primary Functions:
regulates body activities
like growth, metabolism,
nutrient use by secretion
of hormones
Endocrine system

6. Excretory System Primary Organs: kidneys, bladder, ureters, urethra
Primary Functions: to
remove nitrogenous waste
from blood, maintain salt
and water balance, regulate
pH of blood
Excretory System

7. Integumentary system Primary Organ: skin Primary Functions:
waterproofs, cushions and
protects deeper tissues,
regulates temp, secretes
wastes, sensory receptors
for temp, pressure,pain
Integumentary System

8. Lymphatic System Primary Organs: nodes, spleen, tonsils, lymphatic
vessels
Primary Functions:
returns fluids to blood
vessels, cleanse blood,
contains cells involved in
immunity
Lymphatic system

9. Muscular System Primary Organs: skeletal muscle Primary Functions:
“machines” of body
their contraction
allows movement,
manipulation of env,
generate heat,
Muscular System

10. Nervous System Primary Organs: brain, spinal cord, nerves, sensory
receptors
Primary Functions: fast-
acting control system, receives,
interprets, sends appropriate
response to both internal and
external stimuli
Nervous system

11. Reproductive System Primary Organs: male: testes, penis
female: ovaries, uterus
Primary Functions: to
produce gametes, allow for
fertilization, provide a place
for embryo to develop,
nourish infant after birth

12. Respiratory System Primary Organs: nose, pharynx, larynx, trachea,
bronchus, lungs, diaphragm
Primary Functions: to
supply blood with oxygen
and to remove excess
carbon dioxide
Respiratory system

13. Skeletal System Primary Organs: bones, cartilage, ligaments, joints
Primary Functions:
Supports body, framework
for skeletal muscles, protects
organs, formation of blood
cells, stores minerals
Skeletal System