The document discusses the circulatory system and its components. The circulatory system transports blood, nutrients, oxygen, carbon dioxide, hormones, and wastes throughout the body using blood, blood vessels, and the heart. Blood is composed of plasma, red blood cells, white blood cells, and platelets. Red blood cells contain hemoglobin and transport oxygen, white blood cells fight infection, and platelets help with clotting to stop bleeding. The circulatory system is essential for survival as it transports necessary materials and removes wastes.

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3. We need TRANSPORTATION when .
• 2 cells are far away from each other.
• materials needed to be moved from one
place to another place.
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4.  All organisms need food, water and oxygen for survival
 So they need to transport all these.
 Wastes also to be transported.
 The system carrying on this function is called circulatory system.
 It consists of blood, blood vessels and Heart.
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5.  Plasma
-Plasma is the clear, straw-colored liquid portion of
blood that remains after red blood cells, white blood
cells, platelets and other cellular components are
removed. It is the single largest component of human
blood, comprising about 55 percent, and contains
water, salts, enzymes, antibodies and other proteins.
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6.  Red blood cells: The blood cells that carry
oxygen. Red cells contain hemoglobin and it is
the hemoglobin which permits them to
transport oxygen (and carbon
dioxide). Hemoglobin, aside from being a
transport molecule, is a pigment. It gives
the cells their red color
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7. White blood cell, also
called leukocyte or white corpuscle, a
cellular component of the blood that
lacks hemoglobin, has a nucleus, is
capable of motility, and defends the
body against infection and disease.
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8. Platelets are tiny blood cells that help
your body form clots to stop
bleeding. If one of your blood vessels
gets damaged, it sends out signals to
the platelets.
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9.  Blood is the fluid which flows in the blood vessels. The fluid part of blood is
called Plasma which contain cells of various kinds suspended in it.
 It transports substances like digested food from the intestine to the other
parts.
 It carries oxygen from the lungs to the cells if the body.
 Transports wastes for removal from the body.
 (1)RBC:- contain red pigment called hemoglobin.
 Hemoglobin binds with oxygen and transports to all body parts.
 (2) White blood cells:- fight against germs that may enter our body.
 (3) Platelets:- help in blood clotting.
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11. VIENS
 Involved in carrying
oxygenated blood except for
pulmonary arteries
 Located deep within the body.
 Carry blood away from the
heart to various parts of the
body.
ARTERIES
 Involved in carrying
deoxygenated blood except
for pulmonary veins
 Peripherally located closer to
the skin.
 Carry blood towards the heart
from the various parts of the
body.
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