Blood vessels and blood

1. BLOOD VESSELS
HEY FRIENDS, TODAY WE ARE
GOING TO STUDY ABOUT
BLOOD VESSELS

2. BLOOD VESSELS
Blood Vessels -A closed network of tubes
These includes:
Arteries
Capillaries
Veins

3. Blood Vessels:-
There are three types of blood vessels. They are arteries, veins and capillaries.
Arteries :- They carry oxygen rich blood from the heart to all parts of the body. They have thick walls.
Veins :- They carry carbon dioxide rich blood from all parts of the body to the heart. They have thin walls.
Cappilaries :- They are very thin blood vessels which joins arteries and veins.
Pulse/Pulse rate :- Blood flows through arteries at a high pressure causing throbbing movements called pulse.
The number of pulse beats per minutes is called pulse rate. The normal pulse rate is between 72 and 80 beats per
minute.

4. ARTERIES
 Blood vessels that carry
blood away from the
heart are called arteries.
 They are the thickest
blood vessels and they
carry blood high in
oxygen known as
oxygenated blood
(oxygen rich blood).

5. VEINS
Blood vessels that carry
blood back to the heart are
called veins.
They have one-way valves
which prevent blood from
flowing backwards.
They carry blood that is
high in carbon dioxide
known as deoxygenated
blood (oxygen poor blood).

6. Thin Walled
Large irregular lumen
Have valves
Dead space around
Types:
Large
Medium
Small
Veins without valves:
 SVC & IVC
 Hepatic, Renal
 Uterine, Ovarian not Testicular
 Facial
 Pulmonary
 Umbilical
 Emissary
 Portal Veins <2mm

7. VEINS
Veins without Muscular tissue:
 Dural venous sinuses
 Pial Veins
 Retinal
 Veins of erectile tissue of sex organs
 Veins of spongy bones

9. CAPILLARIES (5-8 micron)
The smallest blood vessels are
capillaries and they connect the
arteries and veins.
This is where the exchange of
nutrients and gases occurs.

10. BODY CONTAINS TWO KINDS OF CAPILLARIES
CONTINUOUS-SKIN, LUNG, SMMOTH MUSCLE, CONNECTIVE TISSUES
FENESTRATED- PANCREAS,ENDOCRINE GLANDS, SMALL INTESTINE,CHOROID
PLEXUS,CILLIARY PROCESS etc.

11. BLOOD
Blood transports substances in the body. It has fluid part called plasma and cells like red blood
cells (RBC), white blood cells (WBC) and platelets.
Red Blood Cells :- it contains a pigment called haemoglobin which transports oxygen.
White Blood Cells :- It fight against germs and protects us from diseases.
Platelets :- It helps in clotting of blood

13. Composition of Blood
BLOO
D
BLOOD CELLS PLASMA
WHITE BLOOD
CELLS OR
LEUCOCYTES
PLATELETS
RED BLOOD CELLS
OR
ERYTHROCYTES
PHAGOCYTES
Lorem Ipsum
CARRIES OXYGEN
AND CARBON
DIOXIDE
LYMPHOCYTES

14. RED BLOOD CELLS (ERYTHROCYTES)
Main function: Carries oxygen and
Carbon dioxide
It is also called RBC
Structure Function
● Biconcave disc
shaped
● No nucleus or
mitochondria
● Contains haemoglobin
which is part iron
(haemin) and part
protein (globin)
● Large surface area, can
easily squeeze through
blood capillaries
● Has more space to carry
oxygen and carbon dioxide
● Haemoglobin temporarily
combines with oxygen to
form oxyhaemoglobin to
carry it around the body

15. White blood cells
White blood cells make
up the first line of
defence in the body
against diseases
There are two major
types of White Blood
cells
It is also called as
WBC

20. Some Imfortative Video About Blood
Vessels and Blood
1) Blood Vessels- https://youtu.be/01ML8H83ptk
2) Arteries and Veins- https://youtu.be/mBx7k1d-cdQ
3) Blood- https://youtu.be/tXw6dE-_V24
4) Red Blood Cells (RBC) – https://youtu.be/erMPkJt8Ndg
5) White Blood Cells (WBC) -https://www.youtube.com/watch?v=KZEKlZtqi_4