Page 56 - EM BIOLOGY NOTES 10TH CLASS PSR DIGITAL BOOKS

DRAWING DIAGRAMS - PARTS - PROCEDURE

HUMAN BLOOD CIRCULATORY SYSTEM Blood circulation in human beings
(DOUBLE CIRCUIT CIRCULATOR SYSTEM) (Double circuit circulatory system)
1. In circularity system blood flows continuously in blood vessels
with the help of heart through out in the body.
2. Blood flows through the heart twice for completing one circulation.
So, it is called as Double Circuit Circulation.
3. Oxygenated blood flows from lungs to left auricle of the heart through two pulmonary veins.
4. Then oxygenated blood flows from left auricle into left ventricle through left auriculo
ventricular operture.
5. Then oxygenated blood flows from left ventricle into all parts of the body except
lungs through systemic aorta.
6. Superior vena cava & Inferior venacava are collect the de-oxygenated blood from
all parts of the body except lungs and sent into right auricle of the heart.
7. These de-oxygenated blood enters from right auricle into right ventricle through
right auriculo-ventricular aperture.
8. The De-oxygenated blood sends from right ventricle into lungs through pulmo-
nary artery for oxygenation.

EXCRETORY SYSTEM Excretory system

1. Human Excretory system contains a pair of kidneys, a pair of
ureters, Bladder and Urethra. How to draw
2. One pair of kidneys are attached to the dorsal body wall, on either pl. scan QR
side of vertebral column in the abdominal cavity.
3. Kidneys are bean shaped, reddish brown organ in colour.
4. It is 10cm in length, 5-6 cm in breadth and 4cm in thickness.
5. Outer margin of kidney is convex and inner margin is concave.
6. The notch present in the inner margin is called hilus.
7. Through hilus renal artery enters into the kidney, while Renal vein and ureter are
come out from the kidney.
8. There are a pair of whitish, narrow and muscular tubes of 30cm of length are come
out from each kidney known as Ureters.
9. It moves downward and opens into the urinary bladder.
10. Urinary bladder stores urine bought by two ureters.
11. It opens into outside through urethra.
RAJU’S NATURAL SCIENCE ACADEMY 12. It is a tube that takes urine from urinary bladder to outside.
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