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 List the functions of the
circulatory and respiratory
I can identify the
components of the
circulatory system.
 The circulatory system is composted
of blood, blood vessels, lymphatic
system, and the heart.
 Together they serve as a
transportation system, where
materials are transported to and
from the cells.
 The fluid circulated
 through the circulatory system
by the heart.
 8 percent of the total weight of
an animal is blood.
 The blood is closed of plasma,
blood cells, and palates.
The fluid component of blood that
accounts for 50-60 percent of the bloods
 Plasma is approximately 90 water.
 The remaining 10 percent consist of
small amounts of digested food
nutrients, hormones, gases, and waste
 Blood cells
are neither
red or white.
 Red blood cells or erythrocytes,
are formed in the red bone
 These cells contain hemoglobin,
an iron containing protein.
Hemoglobin aids
in the transport of
oxygen and
carbon dioxide
and is responsible
for giving blood
its red color.
 White blood cells, or
leucocytes, are fewer in
number than the red blood
cells but are larger in size.
Have nucleus
Not confined to the
Will move to areas of
inflammation to engulf
and destroy invading
YouTube - White Blood
Cell Chases Bacteria
No nucleus
Not motile
Confined to the blood
 Platelets are small and easily
damaged blood cells that occur in
large numbers in the blood.
 They attach themselves to injuries in
blood vessels of damaged tissue and
will release enzyme.
 The enzyme leads to the
formation of fibrinogen.
 Fibrinogen is the vital
component in the clotting of
 Transports
 Transports
blood to all
body tissues
except the
blood to the
lungs and back
to the heart.
YouTube - Systemic and
Pulmonary Circulation
 There are three types of blood
 Arteries
 Capillaries
 Veins
Blood vessels that carry blood away
from the heart.
 Arteries carry oxygenated blood to body
tissues, except the pulmonary artery.
 Arteries divide into smaller branches
called arterioles.
 Arterioles carry blood to capillaries
Tiny blood vessels that connect arteries
with the veins.
 Nutrients and oxygen diffuse through
the capillary walls into body tissues.
 Carbon dioxide and other waste
products pass through the capillary walls
and are carried away from body tissue.
 Blood vessels that carry blood
toward the heart.
 Blood flow in veins is only
permitted to flow towards the
heart; this is controlled by valves
that open at regular intervals.
Consist of the lymph vessels, lymph
nodes, and lymph fluid, returns excess
lymph to the circulatory system.
 Lymph filters through the capillary walls
into the spaces between the cells to take
nutrients and hormones to cells to carry
waste products back to the circulatory
 Lymph nodes filter out infectious
organisms such as bacteria and
 Swollen lymph nodes are often a
sign of disease.
 The heart is the major organ of
the circulatory system.
 The heart consist of three layers,
the myocardium, endocardium,
and the epicedium.
 YouTube - Heart4