Transcript Points of Interaction between Body Systems

Points of Interaction between
Body Systems
Human
Organism
SIMPLE
Cells
Tissues
Organs
Organ Systems
Organism
COMPLEX
Things your Cell needs to get daily
From your digestive From your respiratory
system:
system:
Oxygen
Nutrients
Minerals
Enzymes: are
Lipids
proteins that help
Carbohydrates
speed up
Protiens
chemical
Water
reactions and help
your body get
these things.
Cellular Respiration
Chemical reaction that occurs in the cells once
the cell gets nutrients, water, enzymes
(proteins) and oxygen causing energy to be
released.
Chemical ReactionNutrients + oxygen -- energy + water + CO2
Then the Cell needs to get rid of…
C02 using the respiratory system.
Extra water, minerals, and other cellular
waste though the excretory system.
This process is called EXCRETION.
Kidneys
Part of the urinary system
that removes excess
water.
Nephrons are the filtering
parts of the kidney.
Points of Interaction
Food leaves the digestive system and enters
the circulatory system in the small
intestine at points called villi. Process
called absorption.
Points of Interaction
• Alveoli- exchange
CO2 and oxygen
from the bloodstream
back into the
respiratory system
Homeostasis
• Homeostasis- Process by which the body
maintains a stable internal environment
How do you return to homeostasis?
Negative Feedback
• when a change in the normal state occurs
a negative feedback mechanism causes
the body to return to the normal state.
Most common way for the body to return
to homeostasis.
Examples:
• You get overheated, so your body starts to
sweat, and you cool back off
Negative Feedback
• Blood pressure gets too high, so your
heart beats slower, and blood pressure
returns to normal.
More examples
• Your glucose (sugar)
levels in your blood
get to high, so the
pancreases secretes
insulin, causing your
body’s cells to store
the glucose, until
levels return to a
normal level.
Positive Feedback
Positive Feedback- when a change in the
normal state occurs the positive feedback
mechanism causes an even greater
change. -rare in normal healthy bodies.
.
Positive Feedback
A blood vessel is cut, chemicals are
released. Platelets begin to stick to the
walls. This causes MORE chemicals to be
released and MORE platelets to stick until
the cut is sealed
Positive Feedback
The uterus starts contacting causing the
baby to enter the birth canal. When the
brain notices this change it causes the
uterus to contract MORE until the baby is
pushed out.