SCIENCE REVISION QUESTIONS

The circulatory system is responsible for...

• getting food into and out of the body and for making use of food to keep the body healthy.

• the flow of blood, nutrients, oxygen and other gases, and as well as hormones to and from cells.

• the intake and exchange of oxygen and carbon dioxide between the body and the environment and including the nasal passages, larynx, trachea, bronchial tubes, and lungs.

Arteries are...

• blood vessels responsible for carrying oxygen-rich blood away from the heart to the body.

• blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation.

Veins are...

• two of the body's main type of blood vessels.

• blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation.

Blood is made up...

• by four main components, Plasma, Red Blood Cells, White Blood Cells, and Platelets.

• by plasma and platelets.

• by red blood cells, white blood cells.

The main organ of the circulatory system is...

• veins and arteries.

• the heart.

• the blood.

The heart is divided in...

• three atriums and two ventricles.

• right and left atriums and ventricules.

• pulmonary veins and aorts.

What is the main function of the circulatory system?

• secrete enzymes

• digest proteins

• produce hormones

• transport materials

Which gas is transported by the circulatory system in humans and is used by cells during respiration to release energy stored in food?

• carbon dioxide

• nitrogen

• hydrogen

• oxygen

The human body has specialized cells, such as white blood cells, to help protect it from many diseases. Describe what these specialized cells do to protect the body from the disease.

• they carry oxygen

• they fight and destroy germs

• they give blood its color

• they clot when we get a cut

What are the main organs of gas exchange in the respiratory system?

• diapragm
• lungs
• trachea
• bronchi