Blood

What are the components of blood?

Plasma

Red Blood Cells

White Blood Cells

Platelets

How much % of blood does plasma make up

It makes up 55% of blood

What is plasma made of?

90% water

7% proteins

3% dissolved materials that are transported

2 types of plasma proteins?

Antibodies

Clotting Proteins

Function of plasma?

Transports materials

Carries heat around the body

Red blood cells (erythrocytes)

Produced in red bone marrow

Contain haemoglobin

Biconcave in shape

No mitochondria

No nucleus

What is oxyhaemoglobin?

When haemoglobin joins with oxygen in the lungs

What is haemoglobin?

When the cells use oxygen, oxyhaemoglobin converts back to haemoglobin

What is the role of haemoglobin in red blood cells?

Transport oxygen

White blood cells (leuocyctes)

Larger than red blood cells

No definite shape

Have a nucleus

Made in the red bone marrow

Function of white blood cells

Fight infections

How do white blood cells fight infections?

Monocytes / phagocytes engulf the harmful bacteria and digest them

Lymphocytes produces antibodies

2 types of white blood cells?

Monocyctes / phagocytes

Lymphocytes

Platelets (thrombocytes)

Made in the red bone marrow

Role of platelets

Clot the blood

Functions of blood clots

Reduce blood loss

Prevent the entry of micro organisms

Haemophiliacs

Unable to clot their blood

Thrombosis

Clotting of blood from damaged blood vessel walls

Blood groups

A / B / AB / O

Features of the rhesus factor

People who have rhesus factor are rhesus positive (Rh +)

People who do not have the rhesus factor are rhesus negative (Rh - )