Blood - Hurumanu 2 - Science

In Science, we began learning about human blood. We looked at what are the main types of blood, it's purpose, functions, and how it benefits our body. The study of blood is also known as "Hematology" in a scientific way. There are four main types of blood cells. They are the Red blood cells, White blood cells, Plasma, and Platelets. Before we look at the definitions and the functions of those blood, let's look at what are the important jobs of blood in the body.

Blood has many functions:

It carries oxygen from your lungs to your cells.

It carries carbon dioxide from your cells to your lungs.

It carries hormones from the glands around your body.

It regulates your temperature by moving heat around your body.

Definitions + Functions of types of blood:

• Red Blood Cells - Also known as RBC's or Erythrocyte. Red blood cells make up about 45% of your blood. It contains a chemical called "Hemoglobin". Hemoglobin is responsible for transporting oxygen around your body. 

• White Blood Cells - Also known as Leukocytes. It is responsible for fighting infection and disease around your body. It only increases if one individual person is fighting through infection or disease. Then it decreases when a person is perfectly healthy. 

• Plasma - Plasma is rather a straw-colored liquid. It transports carbon dioxide from your cells to your lungs, nutrients from the small intestine to your cells, and chemical messengers (called hormones) to your cells. It makes up about 54% of our blood.

• Platelets - Platelets are tiny fragments (pieces) of cells. It is responsible for making blood clot when you get a cut from your skin. That way, you don't lose a lot of blood.

Your blood is red, so why are your veins blue?

How wounds heal itself?

How does your immune system work?