The Circulatory System 📚 .

Living organisms need to take in & transport essential ______ around their body .

• food

• nutrients

• waste

• oxygen

Living organisms transport (a)   products back out into the environment .

Large organisms cannot transport nutrients fast enough by ____ alone .

• carbon dioxide

• contraction

• oxygen

• diffusion

Which of the following materials need to be transported around the body ?

• nutrients , carbon monoxide , urea , heat , antibodies , hormones .

• fructose , glucose , amino acids , blood , urea .

• nutrients , water , oxygen , carbon dioxide , hormones , antibodies , urea , & heat .

• waste materials , food , nitrogenous waste , plasma , heat .

These organisms have a small surface _____ to ratio

• nutrients

• ratio

• diffusion

• transport

The ____ ventricle wall is thicker & more muscular than the _____ ventricle wall .

• third , fourth

• left , right

• large , small

• lateral , right

Which ventricle has to pump blood a further distance ?

• right

• left

The right ventricle pumps blood to the ____ only .

• heart

• lungs

• liver

• atria

The left ventricle has to pump blood to the / around the _____

• atria

• lungs

• entire body

• none of the above

In the wall of the _____ atrium are specialised ____ cells that act as the hearts ____

• right , muscle , pump

• left , blood , beat

• right , muscle , pacemaker

• left , muscle , pacemaker