blood is made up of liquid and solids. The liquid part, called plasma, is made of water, salts, and protein. Over half of your blood is plasma. The solid part of your blood contains red blood cells, white blood cells, and platelets.
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INTRODUCTION TO BLOOD!.pptx
1. INTRODUCTION TO BLOOD!
Blood is a fluid connective tissue that consists
of plasma, blood cells and platelets.
It circulates throughout our body delivering
oxygen and nutrients to various cells and
tissues.
It makes up 8% of our body weight. An
average adult possesses around 5-6 litres of
blood.
3. Types of Blood Cells
Red blood cells (Erythrocytes)
RBCs are biconcave cells without nucleus in
humans; also known as erythrocytes.
RBCs contain the iron-rich protein called
haemoglobin; give blood its red colour.
.Their main function is to transport oxygen from
and to various tissues and organs.
5. White blood cells (Leucocytes)
White blood cells (Leucocytes)
Leucocytes are colourless blood cells.
They are colourless because it is devoid of
haemoglobin.
They are further classified as granulocytes and
agranulocytes.
WBCs mainly contribute to immunity and defence
mechanism.
7. Components Of Blood
There are many cellular structures in the
composition of blood.
When a sample of blood is spun in a centrifuge
machine, they separate into the following
constituents:
Plasma, buffy coat and erythrocytes.
Thus blood contains RBC, WBC, platelets and
plasma.
9. Plasma
The liquid state of blood can be contributed to plasma
as it makes up ~55% of blood.
It is pale yellow in colour and when separated.
Blood plasma consists of salts, nutrients, water and
enzymes.
Blood plasma also contains important proteins and
other components necessary for overall health.
Hence, blood plasma transfusions are given to
patients with liver failure and life-threatening injuries.
12. Arteries
Arteries are strong tubes and muscular in nature. These blood
vessels carry oxygen-rich blood from the heart to all the
tissues of the body.
Aorta is one of the main arteries that arise from the heart
and branches further.
爐оぎ爐朽え爐爐鉦爐 爐爛爐萎
爛 爐朽い 爐爛爐 爐爐爐爛爐 爐爛爐爛爐 爐爐 爐爛爐逗 爐項爐爛 爐爛
爐萎爛爐 爐朽ぞ爐爐項爐鉦踱 爐項爐爐 爐伍 爐爐爛爐伍爐爐 爐爛爐爛爐 爐萎爛爐
爐爛 爐逗ぐ爛爐 爐
爛 爐伍き爛 爐爐む爛爐 爐む 爐迦 爐爐鉦い爛 爐項爐爛
爐爐項ぞ爐оぎ爐爛 爐爛爐爛爐 爐оぎ爐爐爐爛爐 爐爛爐 爐伍 爐踱 爐項 爐爛 爐項爐爐
爐爐 爐逗ぞ爐爐鉦爐 爐伍 爐爐爛 爐爐爐爐迦い爛 爐項
13. Veins
Veins are elastic blood vessels which carry deoxygenated blood
from all parts of the body to the heart.
The Pulmonary vein carries oxygenated blood to the heart from
the lungs and the umbilical vein carries oxygenated blood from
the placenta to the foetus.
爐爐伍爐 爐迦爐爐爐鉦ぐ 爐萎爛爐 爐朽ぞ爐爐項爐鉦踱 爐項爐む 爐項爐 爐爛 爐逗ぐ爛爐 爐
爛
爐伍き爛 爐爐項じ爛爛爐 爐伍 爐爐爛爐伍爐爐 爐萎爐項い 爐萎爛爐 爐爛 爐項爐爐
爐む 爐迦 爐爐鉦い爛 爐項爐爛 爐爐迦爐爐爐爐萎 爐朽ざ爐萎ぞ 爐爐爛爐伍爐爐 爐爛爐爛爐
爐萎爛爐 爐爛 爐
爛 爐爐÷爐 爐伍 爐項爐爐 爐む 爐迦 爐爐鉦い爛 爐項 爐爐
爐爐爐爐爐鉦げ 爐爐逗ぐ爐 爐爐爛爐伍爐爐 爐爛爐爛爐 爐萎爛爐 爐爛 爐爛爐迦爐伍爐爐爐 爐伍
爐爛爐萎爐 爐む 爐迦 爐爐鉦い爛 爐項爛
14. Capillaries
Capillaries
On reaching tissues, arteries branch further into extremely thin
tubes called capillaries.
Capillaries bring about the exchange of substances between blood
and tissues.
爐爐む爐爛爐 爐む 爐爐項爐爐爐爛 爐爐, 爐оぎ爐爐爐爐鉦爐 爐爐爛 爐爐鉦爐 爐爐む爐爐爐о 爐爐むげ爛 爐爐爐迦く爛爐
爐爛爐 爐逗ぞ爐爐 爐爐萎い爛 爐項爐 爐爐爐爛爐項爐 爐
爛 爐爐逗爐鉦踳爐 爐爐項ぞ 爐爐鉦い爐 爐項爛 爐
爛 爐爐逗爐鉦踱 爐萎爛爐 爐爐
爐爐む爛爐 爐
爛 爐爛爐 爐爐爐鉦ぐ爛爐ム爐 爐爐 爐爐爐鉦え-爐爛爐萎う爐鉦え 爐爐萎い爛 爐項爐爛
15. Layers of Blood Vessels
Tunica Intima: It is one of the innermost and thinnest
layers of arteries and veins. It comprises endothelial
cells. They are in direct contact with the flow of blood.
Tunica Media: It is the middle layer of an artery or vein.
Tunica media is made up of smooth muscle cells.
Tunica Externa: It surrounds tunica media. It is made
up of collagen and is also supported by the elastic
lamina in arteries
16. Functions of Blood
Fluid Connective Tissue
Blood is a fluid connective tissue composed of 55% plasma and 45%
formed elements including WBCs, RBCs, and platelets. Since these living
cells are suspended in plasma, blood is known as a fluid connective tissue
and not just fluid.
Provides oxygen to the cells
Blood absorbs oxygen from the lungs and transports it to different cells of
the body. The waste carbon dioxide moves from the blood to the lungs and
is exhaled.
Transports Hormones and Nutrients
The digested nutrients such as glucose, vitamins, minerals, and proteins are
absorbed into the blood through the capillaries in the villi lining the small
intestine.
17. Functions of Blood
Homeostasis
Blood helps to maintain the internal body
temperature by absorbing or releasing heat.
Protection of the body against pathogens
The White Blood Cells fight against infections. They
multiply rapidly during infections.