Carbon dioxide and other toxic waste is carried into blood by

  • red blood cells
  • white blood cells
  • plasma
  • platelets

The walls of arteries are thick because of

  • huge amount of blood
  • pressure of blood
  • gravity
  • highly oxygenated blood

Deoxygenated blood is carried by

  • arteries
  • veins
  • capillaries
  • nerves

In 1 mm3, the number of platelets is

  • 100000
  • 150000
  • 200000
  • 250000

The dissolved food is taken from

  • liver to cells
  • stomach to cells
  • lungs to cells
  • heart to cells

The task of white blood cells is to

  • defend a body from disease
  • transport oxygen
  • heal wounds
  • refresh heart

"Hemoglobin "is a combination of

  • carbohydrates and fats
  • carbohydrates and proteins
  • fats and proteins
  • proteins and iron

Yellow pus in the wound is actually

  • red blood cells
  • plasma
  • platelets
  • infected white blood cells

The deoxygenated blood is pumped to

  • arteries
  • lungs from heart
  • heart from lungs
  • veins

Top two chambers of heart are known as

  • atria
  • ventricles
  • upper chambers
  • lower chambers

A white blood cell is two times of a

  • red blood cell
  • platelet
  • tissue cell
  • none of above

'Oxygen' is taken from

  • cells to lungs
  • heart to lungs
  • lungs to cells
  • cells to heart

The heart is also called

  • muscular pump
  • pumping device
  • pumping machine
  • pumping muscle

The life span of red blood cells is about

  • 100 days
  • 200 days
  • 300 days
  • 400 days

If bacteria are taken over by white blood cells, their life span

  • decreases
  • increases
  • remains same
  • may increase or decrease

'Plasma' contains water along with important

  • food chemicals
  • cells
  • tissues
  • bacteria

When atria contracts, ventricles

  • relax
  • also contract
  • squeeze
  • block

The cells generally known "the army of human body" are

  • white blood cells
  • platelets
  • red blood cells
  • antigens

The artery that carries deoxygenated blood is

  • renal artery
  • hepatic artery
  • mesenteric artery
  • pulmonary artery

The elasticity of red blood cells helps them to

  • pass through capillaries easily
  • absorb oxygen easily
  • release carbon dioxide easily
  • move in the veins easily
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