Human blood looks like a single substance but it actually consist many different substances and particles like white blood cells, red blood cells, plasma, and platelets (help blood to clot), etc. All of these things are visible when blood is put under a microscope. Doctors can even separate the blood from the plasma by placing it in a centrifuge which spins the blood around and uses a force to cause separation. According to this evidence, human blood could be considered .....

PHYSICAL SCIENCES

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Human blood looks like a single substance but it actually consist many different substances and particles like white blood cells, red blood cells, plasma, and platelets (help blood to clot), etc. All of these things are visible when blood is put under a microscope. Doctors can even separate the blood from the plasma by placing it in a centrifuge which spins the blood around and uses a force to cause separation. According to this evidence, human blood could be considered ____

A	a solution
B	a suspension
C	a colloid
D	a compound

Explanation:

Detailed explanation-1: -Your blood is made up of liquid and solids. The liquid part, called plasma, is made of water, salts, and protein. Over half of your blood is plasma. The solid part of your blood contains red blood cells, white blood cells, and platelets.

Detailed explanation-2: -Blood brings oxygen and nutrients to all the parts of the body so they can keep working. Blood carries carbon dioxide and other waste materials to the lungs, kidneys, and digestive system to be removed from the body. Blood also fights infections, and carries hormones around the body.

Detailed explanation-3: -Human blood is always warm blooded whereas cold blooded in other animals except in mammals and birds. The percentage of the cell types in human and other animals are different between each other. In humans blood vascular system is closed, whereas some animals have open blood vascular system.

Detailed explanation-4: -Normal red blood cell counts differ based on the individual: Men: 4.7 to 6.1 million red blood cells per microliter of blood. Women: 4.2 to 5.4 million red blood cells per microliter of blood. Children: 4.0 to 5.5 million red blood cells per microliter of blood.

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