Cardiovascular system

What is the main function of the cardiovascular system?

• A. To break down food molecules for energy

• B. To transport blood throughout the body

• C. To generate electrical signals for the nervous system

• D. To store excess nutrients

The cardiovascular system works closely with another system to deliver oxygen and nutrients to cells. What is this system?

• A. Respiratory system

• B. Digestive system

• C. Excretory system

• D. Endocrine system

Besides delivering oxygen and nutrients, what other waste products does the cardiovascular system help remove from cells?

• A. Carbon dioxide

• B. Excess water

• C. Both (a) and (b)

• D. None of the above

The heart is a muscular organ divided into how many chambers?

• A. 1

• B. 2

• C. 3

• D. 4

* A. Right atrium

* B. Right ventricle

* C. Left atrium

* D. Left ventricle

* (i) Receives oxygen-rich blood from the lungs

* (ii) Pumps oxygen-rich blood to the rest of the body

* (iii) Receives oxygen-depleted blood from the body

* (iv) Pumps oxygen-depleted blood to the lungs

What is the thick muscular wall responsible for pumping blood throughout the body called?

• A. Pericardium

• B. Mayocardium

• C. Endocardium

• D. Septum

Blood is a type of tissue. What are the two main components of blood?

• Plasma and muscles

• Plasma and red blood cells

• White blood cells and platelets

• Red blood cells and muscles

What is the main function of red blood cells?

• To fight infection

• To help blood clot

• To carry oxygen throughout the body

• To transport nutrients

Blood pressure is the force exerted by blood against the walls of your arteries. What are the two main pressure readings in a blood pressure measurement?

• High pressure and low pressure

• Oxygenated pressure and deoxygenated pressure

• Systolic pressure and diastolic pressure

• Top number and bottom number

Briefly describe the role of white blood cells in the body.