Sathishkumar
Stories (7/0)
What are platelets and what is their role in blood?
Platelets are otherwise called as thrombocytes. The word thrombocytes derived from Greek word “thrombos” meaning a “thick drop” or “clot”, and “cyte” means “cell”. These are very small non nucleated discs, produced from the cytoplasm of megakaryocytes in red bone marrow. Their size is about 2 to 4 µm diameter. Normal range of platelet count is between 2,00,000 to 3,50,000 per microliter or 200 x 109 /l and 350 x 109/l. Platelets contain variety of substances that promote blood clotting, which causes hemostasis.
By Sathishkumar3 months ago in Education
White Blood Cells | Types and functions:
White Blood Cells are otherwise called as Leukocytes. The name leukocyte derived from Greek word leuk means ‘white’, cyte means ‘cell’. WBC main role is to protect the body against microbes. WBC surround microbes, engulf and destroy the foreign particles by phagocytosis mechanism.
By Sathishkumar3 months ago in Education
Circulatory Systems in the Human Body
The circulatory systems is one of the most vital system in the human body. It is responsible for the transportation of blood, oxygen, nutrients, and hormones to all the organs and tissues, while also removing waste products and carbon dioxide. The circulatory system consists of the heart, blood vessels, and blood.
By Sathishkumar3 months ago in Education
Red Blood Cells | Formation and Function:
Red Blood Cells are otherwise called erythrocytes. Erythrocyte is derived from the Greek word erythros means ‘red’ and kytos means ‘hollow vessel’. Erythrocytes are circular biconcave nonnucleated discs with a diameter is about 7 microns. RBC is red due to the presence of hemoglobin. Hemoglobin is the protein used to carry oxygen and other essential nutrients.
By Sathishkumar3 months ago in Education
What is positive feedback in homeostasis
The positive feedback mechanism amplifies or enhances the response. In a positive feedback mechanism, the stimulus progressively increases the response, so as long as the stimulus is continued the response is progressively being amplified. Feedback mechanisms like positive and negative feedback play an important role in maintaining homeostasis.
By Sathishkumar3 months ago in Education
Blood: Definition, components and function:
Blood is one of the transport systems that transport essential nutrients and oxygen to various organs and eliminate carbon dioxide from the body. Blood is composed of platelets, plasma, Red Blood Cells (RBC), and White Blood Cells (WBC). Blood is pumped by the heart through the blood vessels. Blood is used to maintain homeostasis.
By Sathishkumar3 months ago in Education
What is negative feedback in homeostasis
The structure of the internal environment is kept up with narrow limits, and this genuinely steady state is called homeostasis. In a real sense, this term implies unchanging, however by and by it portrays, what is happening kept inside narrow limits. At the point when this equilibrium is undermined or lost, a serious risk to the well-is being of the person. There are many variables in the internal environment which should be kept up with in a narrow limits. Homeostasis has maintained by both negative feedback mechanism and positive feedback mechanism.
By Sathishkumar3 months ago in Education