Slide 1 : CIRCULATORY
SYSTEM
PART 1 Dr. Subroto Biswas
BBIPL
Blood circulation was first discovered by William Harvey in 1628 : Blood circulation was first discovered by William Harvey in 1628
Slide 3 : To transport respiratory gases,
Nutrients,
Waste products,
Hormones,
Antibodies,
Salts and
Other materials to various regions of the body How does circulation of blood help us ? For e-learning and queries email..………bisbioin@wiziq.com
TYPES OF CIRCULATORY SYSTEM : TYPES OF CIRCULATORY SYSTEM Open type …
In leeches
(few annelids)
Arthropods,
molluscans and
Ascidians.
Closed type
in annelids,
phoronids,
nemerteans,
cephalopods,
molluscs,
holothurians and
vertebrates (man).
CIRCULATION IN MAN : CIRCULATION IN MAN Closed circulatory system.
Comprises heart, arteries, arterioles, capillaries, venules , and veins A presentation of BBIPL A presentation of BBIPL A presentation of BBIPL A presentation of BBIPL A presentation of BBIPL
Circulating Media : Circulating Media In man the circulating media are…
Blood
Lymph
Hydrolymph
Haemolymph. Other animals A presentation of BBIPL A presentation of BBIPL A presentation of BBIPL A presentation of BBIPL A presentation of BBIPL
Slide 7 : Hydrolymph
A watery fluid with no respiratory pigments.
Transports nutritive substances and wastes.
Found in nematodes, ectoprocts and rotifers
Haemolymph.
Blood-like fluid
Containing proteins and respiratory pigments.
Transports nutrients and wastes,
Found in arthropods and molluscs.
BLOOD : BLOOD Circulating red coloured fluid
Flows in the blood vessels.
By the pumping action of the heart.
Adult human contains about 5 litres of blood.
Science of study of blood and disorders… Hematology
Slide 9 : The blood corpuscles 42-45% of the blood, called hematocrit (composition of the blood).
Blood is composed of three types of cells -erythrocytes, leucocytes and blood platelets.
Slide 10 : red blood cells white blood cells platelets plasma carbon dioxide digested food waste (urea) hormones oxygen BLOOD what’s inside
Slide 11 : Plasma ( Fluid component ) A straw-coloured liquid comprising 55% of blood water (90% to 92%)
carbon dioxide
glucose
amino acids
proteins
minerals
vitamins
hormones
waste materials
like urea. It also contains useful things like…
Slide 12 : A presentation of BBIPL A presentation of BBIPL A presentation of BBIPL A presentation of BBIPL A presentation of BBIPL
Red Blood Corpuscles (RBC) : Red Blood Corpuscles (RBC) 5 to 5½ millions (50 to 55 lakhs) in one cc of blood
Rounded or disc-like and biconcave
The mature RBCs are non-nucleated
Except in camel where RBCs are nucleated.
RBC count increases during exercise and stress
Decreases during rest, sleep, menstruation and pregnancy.
Slide 15 : People living in high attitudes
Have more RBCs.
Count falls in anaemia and rises in polycythemia.
The life of RBC in frog is 90 to 100 days
In man for about 120 days.
RBCs are made in the embryos by the liver or spleen,
After birth they are formed in red bone marrow, therefore, called cradle of RBC.
Slide 16 : The organs which produce blood corpuscles are known as haemopoietic tissues
Process of their formation is called haemopoiesis (erythropoiesis = RBC formation; leucopoiesis = WBC formation).
As the erythrocyte becomes older they disintegrate in the spleen.
So the spleen is said, to be the graveyard or slaughter house for red cells.