Transcript Document

Part 4
Respiration System
I. Respiratory System
A-The circulatory system gets
the oxygen it provides to the
cells from the respiratory
system.
1. Cells use this oxygen in the
process of cellular
respiration, in which nutrients
from digested food combine
with the oxygen to release
energy and produce the waste
materials carbon dioxide and
water.
B. Respiration brings oxygen
from the air to the blood,
and returns carbon dioxide
from the blood to the air.
C. Path of air through
respiratory system.
1- Air first enters the
nose were it is cleaned and
warmed.
2- Clean air is now passed
through the trachea or
windpipe.
3- The air branches off to the
lungs through tubes called
bronchi.
4- The bronchi branch into
smaller & smaller tubes call
Bronchiole at the end of these
tubes are tiny air sacs, called
alveoli that are surrounded by
capillaries.
a- Here gases are exchanged;
oxygen into the blood and
CO2out of the blood by the
process of diffusion and then
exhaled out.
The Respiratory System
Nasal passage
Nose
Larynx
Nostril
Mouth
Trachea
Bronchi
Alveoli
Lungs
Diaphragm
The Respiratory System
Nose
Mouth
Pharynx
Larynx
Lung
Trachea
Bronchus
Diaphragm
Bronchiole
Alveoli
II-The Excretory System
A-Wastes are removed from the
blood, and the body, by the
excretory system. It consists of
the lungs, skin, kidneys, and liver.
1. The lungs rid the body CO2 & H2O
vapor each time you exhale.
2. The skin gets rid of wastes when you
perspire. Perspiration = liquid waste
consisting of water and salts.
3.The kidneys = maintain a proper
balance of water and minerals. The
kidneys, remove excess water, salts,
and urea from the blood. This fluid
is called urine.
Vein
Kidney
Ureter
Bladder
Urethra
Artery
Kidney
Ureter
III- Metabolism: is the sum of all
the chemical reactions that take
place in your body.
{Take in food, break it down, and use the
energy in it, your build and repair tissues;
you store fat.}
A- Metabolism can be influenced by
hormones, exercise, diet, and aging.
1. Exercise increases metabolism
because cells need more oxygen.
When you eat too much, your
metabolism stores the excess as
fat. As you reach old age, your
metabolism slows.