Question

What makes blood look red?

Answer 1

Blood is a loose connective tissue which is present throughout the body. It is red in colour and helps in transport of oxygen throughout the body.

Complete Answer:
Before we find out what makes blood look red. Let us first know more about blood. Blood is one of the most important components of life and it is made up of plasma, platelets and blood cells.
There are different types of blood cells which are found in blood,

Red blood cells - They are also known as erythrocytes and they are red in colour. Their main function is to transport oxygen to various tissues and organs
White blood cells - They are also known as leukocytes and they are colourless. Their main function is to provide defense mechanisms and immunity.
Platelets - They help in regulation of blood flow and also help in blood clotting

Now, the reason why blood is red in colour is because it has a protein called haemoglobin. Haemoglobin is basically a red coloured compound known as heme. Heme is very useful from carrying oxygen throughout the bloodstream. The level of haemoglobin in men - 135 to 170 and in women 120-160.

The function of haemoglobin in blood are,
->They are important for the human body as they help i carrying oxygen from lungs to other tissues of the body
->It also helps in transport of carbon dioxide back to the lungs from the tissues
->Deficiency of haemoglobin can lead to a disease is known as anaemia

Note: The function of blood are,
->It helps in transporting oxygen to the cells.
->It also helps in transporting hormones and nutrients to different tissues and organs.
->It also helps in maintaining the body temperature.