Page 42 - ACTIVE SCIENCE 4 TOC

Activity 5.1

Draw the human circulatory system on a chart and paste it on a thermocol sheet.

Let’s Recapitulate

Fill in the blanks.

1. ______________ is located between the lungs.
2. ______________ carry blood from the heart to all the parts of the body.

3. ______________ carry blood from different parts of the body to the heart.

4. Arteries branch out into smaller and thinner blood vessels called ______________.

E xcretory System Factual Study

The excretory system helps in the removal of wastes It takes about a minute for the
from our body. Kidneys, ureters, urinary bladder and blood pumped by the heart to

urethra are the main organs of the excretory system. go all around our body and get
back to the heart in one go.
Kidneys

We have two kidneys in our body. The

kidneys are bean-shaped. These are present Kidneys
just below the ribcage. The kidneys filter
out the harmful waste, i.e., urine, excreta

and excess salts from the body.

Ureters

Ureters are tube like structures. They act
as a carrier that carry waste from kidneys Ureters
to the urinary bladder.

Urinary Bladder

Urinary bladder is a storehouse of urine Urinary
Bladder
until it is passed out from the body.

Urethra

Urethra is a tube that lets out the urine from
the urinary bladder and out of the body. Urethra

Excretory System

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