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Intro to Anatomy – Lesson 3
TSWBAT to identify the 11 body
systems and define the functions
and components of each system.
Organ Systems of the Body - Skeletal
 Protects body organs/tissues
 Provides the framework for muscles
 Produces blood cells
 Stores minerals (calcium)
Composed of: bones, cartilage and ligaments
Organ Systems of the Body – Nervous
 Detects changes
 Stimulates muscles and
glands
 Receives and interprets
sensory information
Composed of: the brain, spinal cord, sense organs
and nerves
Organ Systems of the Body - Lymphatic
 Return tissue fluid to the blood
 Carries certain absorbed food
molecules
 Defends against infection and
diseases
Composed of: thymus, spleen, lymph nodes, and
lymphatic vessels
Organ Systems of the Body - Muscular
 Provides movement
 Maintains posture
 Produces heat
Composed of: muscles and tendons
Organ Systems of the Body- Integumentary
 Protects tissues
 Helps regulate body temperature
 Provides sensory information
Composed of: the skin, sweat glands, hair, and nails
Organ Systems of the Body - Digestive
Receive, break down,
and absorb food
Eliminates
unabsorbed material
Composed of: mouth, tongue, teeth, salivary glands,
pharynx, esophagus, stomach, liver, gallbladder,
pancreas, small and large intestines
Organ Systems of the Body – Endocrine System
Not connected anatomically in the same way that parts of
other organ systems are.
Controls metabolic activities
of body structures
Composed of: Glands that secrete hormones - Pineal
gland, Pituitary gland, Thyroid gland, Thymus gland,
Adrenal gland, Pancreas, Testis (male), Ovary (female)
Organ Systems of the Body - Respiratory
 Intake and output of air
 Exchange of gases between air and blood
Composed of: the nasal cavity, sinuses, pharynx, trachea,
bronchi, larynx and lungs
Organ Systems of the Body - Cardiovascular
 Moves blood through blood
vessels and transports substances
throughout the body
Composed of: the heart, arteries, capillaries, and
veins
Organ Systems of the Body- Urinary
 Removes wastes from blood
 Maintains water and electrolyte balance
 Stores and transports urine
Composed of: kidneys, ureters, urinary bladder, and urethra
Organ Systems of the Body
Female Reproductive
• Produce and maintain egg cells
• Receive sperm cells
• Support development of
embryo and function in birth
process
 Composed of: ovaries,
uterine tubes, uterus,
vagina, clitoris, vulva
Organ Systems of the Body
Male Reproductive
• Produce and maintain sperm cells
• Transfer sperm cells into female reproductive
tract
Composed of: scrotum, testes,
epididymis, seminal vesicles, prostate
gland, urethra, penis
System Cooperation
Body systems must work together for
humans to function properly:
EX #1 – Integumentary system & Skeletal
System…The skin protects all organs &
bones, and also produces vitamin D. Vitamin D
is used for proper absorption of calcium.
Calcium is needed for proper bone
growth/development. Not enough Vitamin D, not
enough Calcium absorbed  weak/broken bones!
System Cooperation
EX #2: Respiratory system & Circulatory
system: Lungs take in oxygen in exchange for
carbon dioxide. Alveoli in the lungs give
oxygen to red blood cells (hemoglobin) to carry
to all parts of the body for respiration. If alveoi
are affected, not enough oxygen is taken in and
respiration slows  decrease in the amount of
energy produced
Organ Systems Don’t Work Alone
The respiratory system takes in oxygen and removes waste gases.
The cardiovascular system is responsible for delivering the
oxygen to all parts of our bodies.
Organ Systems Interrelationships
 Nutrients and oxygen
are distributed by the
blood
 Metabolic wastes are
eliminated by the
urinary and
respiratory systems
Figure 1.2
Create Want Ad
• CHOOSE A BODY SYSTEM
• WRITE EITHER A “FOR SALE” OR “WANTED TO
BUY” AD FOR THAT SYSTEM.
• AD MUST INCLUDE PURPOSE/FUNCTION AND
PARTS OF THE SYSTEM.
• WRITE IN AD FORMAT (25 +/- WORDS IN
LENGTH)
• Grading: Content = 15 pts (Purpose, Function & Parts);
Creativity = 5 pts
Survival Need or Necessary Life Function?
Metabolism
Nutrients
Reproduction
Oxygen
Water
Maintaining Boundaries
Excretion
Normal Body Temperature
Responsiveness
Atmospheric Pressure
Movement
Growth
Digestion