Page 21 - Summary 6 2025
P. 21

Delta Modern Language Schools  2 Circulatory System
Science department
Grade 6
1st term 2024- 2025

• Structure:

                               Circulatory system

Heart                                                Blood vessels

                               Arteries  Veins        Blood capiilaries

➢ Heart muscle : - Pumps the blood to all body cells

➢ Blood vessels: - Allow blood to flow throughout the body.

❶ Arteries.                    ❷Veins.               ❸Blood capillaries.

Function:

It transports blood, gases, nutrients and
hormones (secreted by endocrine system)
throughout the body.

Its role during danger:

1) The heartbeats increase causing:
2) The heart pumps more blood to the muscles, the heart and the

   other organs.
3) The blood pressure increases.

                               3 Respiratory system

Structure:

It consists of lungs, diaphragm and airways (such as
trachea and bronchi).

Function:

It provides the body with oxygen gas and gets rid of
carbon dioxide gas.

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