The human body has approximately 60,000 miles of blood vessels. That’s enough to go around the earth twice with some left over.
by David Stone
Assorted Ideas, Large & Small
What is blood flow?
The average adult has just over 1 gallon of blood. This blood circulates the body through a system of tubes called vessels. The heart pumps the blood around the body and the vessels carry it in many directions.
Why do we even have blood flow?
The main reason blood circulates is to transport oxygen and nutrients to the cells of your body and carbon dioxide and other waste products away from those cells. Oxygen is vital for the cells functioning properly. Nutrients are also essential for cell function – they provide the elements that cells need for carrying out their work.
How does blood get all around your body?
Blood flow is driven by the heart, essentially a pump that never ends. That is, when the pump stops, you die. When it stumbles, you suffer an attack.
The pumping action of the heart creates pressure that forces the blood through the vessels. The vessels themselves are flexible and elastic, which helps to regulate pressure and flow.
What are the different types of blood vessels?
There are three main types of blood vessels: arteries, veins and capillaries. Arteries carry blood away from the heart and towards your body’s tissues. Veins return blood to the heart.
Capillaries are tiny vessels that connect the arteries and veins and are the primary link between the bloodstream and the body’s cells.
What is blood pressure?
Blood pressure is the force of blood against the walls of the blood vessels. It is measured in millimeters of mercury (mmHg) and is usually given as two numbers – the systolic pressure (the top number) and the diastolic pressure (the bottom number).
What’s the difference between systolic and diastolic pressure?
Systolic pressure is the pressure in the arteries when the heart muscle contracts and pumps blood into them. Diastolic pressure is the pressure in the arteries between heartbeats, when the heart muscle is at rest.
What’s normal blood pressure?
Normal blood pressure is typically around 120/80 mmHg.
What causes high blood pressure?
There are many possible causes of high blood pressure, including lifestyle factors such as being overweight, smoking or drinking too much alcohol.
Other causes can include stress, lack of exercise, and family history. High blood pressure is a major risk factor for heart disease and stroke.
How can I keep my blood pressure healthy?
There are several things you can do to keep your blood pressure healthy, including eating a healthy diet, maintaining a healthy weight and exercising regularly. You should also avoid smoking and drinking too much alcohol.
If you have high blood pressure, some medications can help to lower it.
How does your blood know what nutrients to carry into your body?
The blood is full of nutrients like amino acids, lipids, minerals, and vitamins. It uses these to perform its many functions.
How do cells signal the bloodstream about your needs for nutrients?
Cells signal the bloodstream about their need for nutrients by releasing chemical signals called hormones. These signals travel through the bloodstream and bind to receptors on cells in the organs that regulate nutrient levels, such as the liver.
The liver then releases the nutrients into the bloodstream so that they can be delivered to the cells that need them.
How is blood made?
The bone marrow is responsible for making blood. The marrow is the spongy tissue inside of bones.
Inside the marrow, there are stem cells that develop into red blood cells, white blood cells, and platelets.
Red blood cells carry oxygen to all parts of the body. White blood cells help the body fight infection. Platelets help the blood clot.
What are the different types of blood cells?
There are three main types of blood cells: red blood cells, white blood cells and platelets. Red blood cells carry oxygen around the body. White blood cells fight infection. Platelets help stop bleeding.
What is hemoglobin?
Hemoglobin is a protein in the red blood cells that carries oxygen around the body.
What is the difference between veins and arteries?
Arteries carry blood away from the heart and towards the body’s tissues. Veins return blood to the heart.
What is the difference between capillaries and veins?
Capillaries are tiny vessels that connect the arteries and veins and provide a link between the bloodstream and the body’s cells. Veins are larger than capillaries and carry blood back to the heart.
What is anemia?
Anemia is a condition in which there are not enough red blood cells in the body. This can cause fatigue and other symptoms.
What is sickle cell disease?
Sickle cell disease is a condition in which the red blood cells are shaped like crescent moons. This can block the flow of blood and cause pain.
What is leukemia?
Leukemia is a cancer of the blood cells. It can cause fatigue, weight loss, and other symptoms
What is a blood transfusion?
A blood transfusion is a procedure in which blood is taken from one person and given to another. This can be done to replace lost blood or to provide extra blood for someone who is sick or injured.