In this video I discuss what is blood, the primary functions of blood, and what is blood made of. I also discuss the components of blood, what does blood do, and the functions of blood cells.
What is blood?
Well, blood is made up of 4 major components, plasma, red blood cells, white blood cells, and platelets. Plasma makes up about 50 to 55% of blood, and its main contents include, about 90% water, glucose, hormones, enzymes, proteins, minerals and various waste products like carbon dioxide.
Red blood cells make up about 45 to 50% of blood, and their primary function is to carry oxygen to cells and deliver carbon dioxide to lungs. White blood cells make up 1-2% of blood, and they help protect the body against disease and invaders. Platelets make up 1 to 2% of blood, and they are involved in clotting and help prevent bleeding.
Blood has 3 major functions in the body.
Blood transports oxygen and other various nutrients to cells throughout the body, it also carries waste products and carbon dioxide to the kidneys and lungs for removal from the body.
Blood carries white blood cells which fight infections that threaten to damage the body.
Blood regulates body temperature, as well as ph balance.
In this video I discuss the circulatory system or cardiovascular system, the functions of the cardiovascular system and the path of blood flow through the heart and components of the cardiovascular system.
Transcript (partial with notes)
The circulatory system is responsible for transporting nutrients, such as, hormones, water, oxygen and other nutrients to and from virtually all cells throughout the body.
It also carries away carbon dioxide and other waste materials produced by cells.
The cardiovascular system is made up of the heart, vessels, which include arteries, veins and capillaries.
Let’s look at the path of nutrients though the body…
1st, Oxygen is absorbed in the lungs, where it enters the bloodstream and goes to the heart, which pumps it into arteries. Arteries take the oxygenated material to organs and tissues, where they merge into capillaries.
Many capillaries enter tissue to form a capillary bed. The oxygenated material drops off its nutrients, and collects waste materials such as carbon dioxide.
This deoxygenated waste continues through the capillary which merge into veins. The veins then take the waste to the heart, which pumps it back to the lungs where it can get oxygenated again.