Natural Science 4th Grade

Explain the route of carbon dioxide in the body.

TRUE or FALSE. The circulatory system contains the heart, blood vessels, and blood.

TRUE or FALSE. Veins only carry blood with carbon dioxide.

TRUE or FALSE. Gas exchange sometimes occurs in capillaries.

When your lungs get much bigger, so your diaphragm moves down, and your rib cage moves up and out. This makes space inside your chest. What is this process called?

Complete the parts of male Reproductive system: _______, _______, scotum, sperm, ______

Explain the route of oxygen in the body.

Before the bay is born, it is called a ________.

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An _______ is when the cels grow after fertilisation.

TRUE OR FALSE: Blood from the lungs to the heart goes into the left atrium and contains oxygen.

_________ is when a sperm joins an ovum.

It transports air from the mouth into the bronchi.

An adult male's lungs can expand to hold ______ of air.

It helps contract and expand the lungs.

Choose which words do not belong to the group: blood, nose and mouth, trachea, lungs, ovum, alveoli, vulva, tissue cells

Complete the female reproductive system: Ovaries, ________, vulva, ______,_____, ova

TRUE or FALSE. The circulatory system transports carbon dioxide to all cells in the body.

They are the small air scs in the lungs.

The _______ are the blood vessels that take the blood to the heart.

He/She is the doctor who operates on patients, who is it?

TRUE or FALSE. The heart has four chambers.

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