Std. 7 th

Sub. - Science

8. Circulation of blood

8.Circulation of blood

Blood circulation The function of circulatory system The structure of the circulatory system Blood donation Blood groups Excretion

Std. 7 th

Sub. - Science

• Blood circulation-Many substances like water,oxygen,

soluble food materials,and waste substances are exchanged between the parts of the body

Std. 7 th

Sub. - Science

8. Circulation of lood

• Functions of circulatory system

• Soluble substances

• Oxygen• Hormones• Waste products

Std. 7 th

Sub. - Science

8. Circulation of blood

• The structure of the circulatory system

• Heart-a muscular organ.

• Arteries-carry blood from heart to different parts of the body.

Veins-carry blood from different parts of the body to the heart

• Capillaries-are the blood vessels which are as fine as hair.

Blood donation

• The action of a healthy person giving blood for use by a patient is called blood donation.

• The person who donates blood is called donor.

The person who receives blood is called receiver

Blood Groups

• A,B,AB,O are the four blood groups.

• Universal donor-O

• Universal receiver-AB

Excretion

• The process of passing out waste substances from the body is called excretion.

• Waste substances-urea ,ammonia,salts.

• Waste products in plants-

Colacosia leaves-calcium oxalate.

Rubber –sap

Khair-katechu

Babool-gum

Question hour

• 1Define excretion.• 2Name the waste products formed in plants.• 3Name the parts of human circulatory system.• 4Give reason-The walls of capillries are thin.• 5Write a note on blood donation.

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

• Blood circulation• The function of circulatory system• The structure of the circulatory system• Blood donation • Blood groups • Excretion

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood

SppP

Rayat Shikshan Sanstha , Karmveer Vidhyaprabhodhini Madhya Vibhag ,Satara

Std. 7 th

Sub. - Science

8. Circulation of blood