Roman Saini is teaching live on Unacademy Plus
HUMAN PHYSIOLOGY Presented By Roman Saini
Course Structure 1. 2. 3. 4. 5. 6. 7. Human Digestive System Human Respiratory System Human Circulatory System Human Excretory System Human Skeletal System Human Neural System Human Endocrine System
HUMAN CIRCULATORY SYSTEM 1. 2. 3. 4. 5. 6. Body Fluid-Blood and Lymph Blood- Structure and Blood Groups Coagulation of Blood Heart-Structure and Function Regulation of Cardiac Activity Disorders of Circulatory System
Body Fluids-Blood and Lymph For the functioning of the body, all living cells have to be provided with nutrients, o2 and other essential substances. Along with, the waste and harmful substances produced have to be removed for healthy functioning of tissues. - -So, it is essential to have sufficient mechanisms for the movement of these substances to the cells and from the cells. Different organisms evolved different methods for this transport. -Simple organisms like sponges circulate water from their surroundings -More complex organisms use special fluids within their body to transport such -Blood and lymph are the most commonly used body fluids by most of the through their body cavities to facilitate the cells to exchange these substances. materials higher organisms including human for this purpose
Blood Structure- Blood is a special connective tissue. Plasma (55 %) Erythrocytes (RBC) Formed Elements (45 %) Leucocytes (WBC) Blood Thrombocytes (Platelets) Fluid Matrix
Plasma -It is a straw colored and viscous fluid. It constitute nearly 55% of the blood. Platelets Red blood cells It is made up of two major elements as 1. Water (90-92 %) 2. Protein(6-8%) White blood cells Plasma "There are three maior proteins in the plasma as 1. Fibrinogen - It is needed for clottina or coaqulation of blood Factors for clotting or coagulation of blood are present in an inactive form.
2. Globulins - It is primarily involved in defense mechanisms of the body 3. Albumins- It helps in osmotic balance. "It also contains small amounts of minerals like Na, Ca, Mg, Cl etc. Glucose, amino acid, lipids etc. are also present I plasma as they are always in transit in the body. Plasma without the clotting factors are called SERUM