Std. 7 th Sub. - Science 8. Circulation of blood  Blood circulation  The function of circulatory system  The structure of the circulatory system  Blood.

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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

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

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