When you exercise, your respiratory rate increases. This is true regardless of whether you exercise by stationary methods such as weight lifting, or by a traveling method such as jogging or biking. Clearly, an active body needs more oxygen than a body at rest. The reason for this lies in the complex chemical processes in your muscles and your bloodstream.
blood carries oxygen, so it carries oxygen to your tissues, eg, all your muscles, so you can walk etc, (be alive) I THINK!
The tissues get oxygen from oxygenated blood supply for energy production.
as this gives oxygen to your lungs as you need air to breathe!
because it gives oxygen
It's not really the blood that needs the oxygen. All the living tissues in our bodies needs a steady supply of oxygen, and the blood is what carries that oxygen around and delivers it where it needs to go.
when carbon monoxide is taken in, it replaces the oxygen in the blood. this deprives cells and tissues of oxygen. It increases risk of high blood pressure and heart disease
The iron-containing pigment of the erythrocytes that transports oxygen from the lungs to all of the body tissues would be "Hemoglobin".
It brings both oxygen and nutrients to all types of tissue.
Hypoxia refers to the saturation of oxygen in tissues. If you are taking oxygen therapy, even with 100% oxygen, it is still possible for some tissues not to get the right amount of oxygen due to circulatory problems.
If the oxygen-rich blood and the oxygen poor blood mix the amount of oxygen becomes diluted. The cells and tissues need more oxygen than they will get.
The circulatory system transport nutrients and oxygen throughout the body. It includes the heart and all the blood vessels, including the blood. It also takes waste products out of the tissues.
Without the circulatory system, there is no way for the nutrients we digest to get to all the tissues they need to go. Oxygen wouldn't be able to get there either and the cells would die.