Composition of blood

• Blood transports materials through out the body inside blood vessels.

Plasma• Straw colored,

nonliving part of blood.

• 90% Water• Helps to regulate

body temperature• Contains Electrolytes• Plasma transports

blood cells, products of digestion and hormones throughout the body.

How much blood is in the human body?

• About 5 liters

Erythrocytes

• Shaped like round plates indented in the center.

• Have no nucleus

Questions

• The Average adult has about __________ liters of blood?

• 5

• Describe Plasma?

• Plasma is the straw colored, non-living part of blood. It is 90% water.

• Name 2 materials carried by plasma?

• RBC, Hormones, Digested materials.

Why is blood red?

• Blood is red because it contains hemoglobin and iron rich pigment.

What does hemoglobin do

• Hemoglobin picks up the oxygen molecules and drops off CO2

Carbon Monoxide

• Binds to RBC better than oxygen.

• Not good • Kills us silently• Cant smell it or taste

it.

Questions

• Why is blood red?

• Because it contains hemoglobin

• What does hemoglobin do?

• Hemoglobin carries oxygen

• What is the shape of a red blood cell?

• How does carbon monoxide poisoning occur?

Anemia

• Occurs when the blood does not have enough hemoglobin.

• Treated by taking in more iron

• Because iron makes up hemoglobin

What’s wrong with this picture?

Sickle Cell Anemia

• Genetic disease• Red blood cells

become sickle shape• Cant carry as much

oxygen

Malaria

• Disease that attacks the RBC.

• Causes high fever• If you have sickle cell

shaped RBC can not get the disease.

White Blood Cells

• Fight infections• Large in size• Have a nucleus• Phagocyte

Platelets

• Smallest part of blood• No nucleus• Live 2-4 days• Involved in clotting of

blood

Bone marrow

• Makes the cells of the blood

• Bone marrow is located inside certain long bones.

Leukemia

• Form of cancer in which the bone marrow makes too many white blood cells.

Name the parts of the blood?

• What do platelets do?• Platelets clot the blood• What is the smallest component of blood?• The platelets• What do white blood cells do?• Fight infections• How are red blood cells made?• By the bone marrow