the circulatory system

Question 1

what is the circulatory system”

Answer 1

a system responsible for the transport of substances around the body

Question 2

what does blood carry

Answer 2

blood carries nutrients which have been absorbed from the small intestines and oxygen absorbed from the lungs an it delivers them to cells

Question 3

why do cells need oxygen and nutrients

Answer 3

the need them as raw materials for growth and to carry out respiration

Question 4

where is carbon dioxide and other waste materials transported too ,by the blood ?

Answer 4

transported to organs tat are responsible for their expulsion from the body

Question 5

name the two parts the circulatory system is divided into

explain

Answer 5

1. pulmonary circulation
2. systemic circulation

pulmonary circulation - transports deoxygenated blood to the lungs and brings it back as oxygenated blood the heart

systemic circulation - transports oxygenated blood to the body cells and brings it back as deoxygenated blood to the heart

Question 6

name and explain the three components of the circulatory system

Answer 6

1. (fluid to be transported) BLOOD - all nutrients dissolved in blood
   - CO2 and O2 are carried by red blood cells as they are transported
2. (tube in which blood circulates)BLOOD VESSELS - circulatory system is a closed system because blood never leaves the blood vessels as it moves around the body
3. (a pump to circulate the blood around the body) THE HEART

Question 7

name the three types of blood vessels

Answer 7

1. veins
2. capillaries
3. arteries