Question

what is blood and why it is red​

Answer 1

Answer:

Blood is a fluid connective tissue that consists of plasma, blood cells and platelets. It circulates throughout our body delivering oxygen and nutrients to various cells and tissues. It makes up 8% of our body weight. An average adult possesses around 5-6 litres of blood.

Our red blood cells are red because of the heme groups in hemoglobin. In turn, our blood is red because of the millions of red blood cells that it contains.

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Answer 2

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➦Blood is a fluid that transports oxygen and nutrients to the cells and carries away carbon dioxide and other waste products.

Blood is a transport liquid pumped by the heart (or an equivalent structure) to all parts of the body, after which it is returned to the heart to repeat the process.

➦Blood is red because of a red oxygen- carrying pigment called haemoglobin.