BLOOD

BLOOD

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Blood is an essential biological fluid that travels throughout the body, carrying nutrients and oxygen to the cells and eliminating waste. It is essential for preserving homeostasis and general health.

Red blood cells (erythrocytes), white blood cells (leukocytes), platelets (thrombocytes), and plasma are some of the components that make up blood. These elements serve several purposes:


1. Red blood cells: Hemoglobin, a protein that binds to oxygen, is found in red blood cells, which are the most prevalent cells in the blood. Transporting oxygen from the lungs to the body's tissues and organs is their main job.

2. White blood cells: White blood cells play a role in the body's defense against infections and immune response. They can be further categorized into different types, including neutrophils, lymphocytes, monocytes, eosinophils, and basophils. Each type has a specific role in recognizing and eliminating pathogens, producing antibodies, and regulating the immune system.

3. Platelets: Platelets are small cell fragments involved in blood clotting and the formation of blood clots to prevent excessive bleeding. When there is an injury or damage to blood vessels, platelets adhere to the site, aggregate together, and initiate the clotting process.

4. Plasma: Making up around 55% of the volume of blood, plasma is its liquid component. Water, proteins (including albumin, globulins, and fibrinogen), hormones, electrolytes, minerals, and waste materials make up this complicated mixture. These materials are carried throughout the body by plasma, which also aids in preserving the equilibrium of electrolytes, pH, and fluids.

Functions: The human body uses blood for a number of vital purposes, including:


1. Transportation: Blood returns carbon dioxide, a waste product, to the lungs for excretion while carrying oxygen from the lungs to the body's cells and organs. Additionally, it carries hormones, nutrients, and other essential materials to different areas of the body.

2. Immune protection: The immune system's defense against pathogens including bacteria, viruses, and fungi depends heavily on white blood cells in the blood. They are essential in preventing infections because they recognize, neutralize, and eradicate foreign intruders.

3. Clotting: When a blood vessel is injured, platelets and clotting factors in the blood aid in the formation of blood clots to stop excessive bleeding. Hemostasis is the process that seals the injured area and starts the healing process.

4. Regulation: The body uses blood to control a number of physiological functions, such as fluid balance, electrolyte concentrations, pH balance, and body temperature.

5. Waste removal: Waste products like carbon dioxide and metabolic byproducts are transported by blood to the organs like the kidneys and lungs that are in charge of getting rid of them.

6. Hormone distribution: Blood carries hormones secreted by endocrine glands to specific organs and tissues, controlling a range of physiological processes.


for detailed info or notes; visit:

https://docs.google.com/document/d/e/2PACX-1vQJyT3-bak0omM8QDajGgX7o6XF3rPo1S17gc5pHG4y8Jm0_kaKeuGIRCzsJw3lNcfuEwLmCYnbGtkD/pub


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