dear friend
1) write the function of valves present in between atrium and ventricle?
2) trace the movement of oxygenated blood in the body?
3) write one structural differences between the composition of artery and vein?
4) mentioned any two components of blood?
no spam
do all answer of the given questions
Answers
1). The function of the valves present between the arteries and ventricles is to prevent back flow of the blood.
2). The oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. This blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle.Left ventricle pumps oxygenated blood to different parts of the body.
3). The walls of arteries are thicker when compared to the walls of veins.
4). Two components of blood are :-
Red blood cells ( RBC )
White blood cells ( WBC ).
pls mark me as brainleist
1) the function of valves present in between atrium and ventricle are as follows:-
As the heart muscle contracts and relaxes, the valves open and shut, letting blood flow into the ventricles and atria at alternate times. The following is a step-by-step illustration of how the valves function normally in the left ventricle:
After the left ventricle contracts, the aortic valve closes and the mitral valve opens, to allow blood to flow from the left atrium into the left ventricle.
As the left atrium contracts, more blood flows into the left ventricle.
When the left ventricle contracts again, the mitral valve closes and the aortic valve opens, so blood flows into the aorta.
2. Oxygenated blood is first formed in the lungs which is transported to the heart through the pulmonary vein. It enters through the left atria and passes into the left ventricle. From the left ventricle it passes through Aorta and goes to all body parts and becomes deoxygenated which is again purified in the lungs after passing through the heart.
3. The structural difference are:
Arteries have thick walls because blood emerges from the heart under high pressure .
Veins have thin walls because the blood flowing throw them is no longer under high pressure.
Arteries carry blood away from heart.
Veins carry blood back to heart.
Or in easy words, The walls of arteries are thicker when compared to the walls of veins.
4. The component of blood are as follows:
Plasma
The liquid component of blood is called plasma, a mixture of water, sugar, fat, protein, and salts. The main job of the plasma is to transport blood cells throughout your body along with nutrients, waste products, antibodies, clotting proteins, chemical messengers such as hormones, and proteins that help maintain the body's fluid balance.
Red Blood Cells (also called erythrocytes or RBCs)
Known for their bright red color, red cells are the most abundant cell in the blood, accounting for about 40 to 45 percent of its volume. The shape of a red blood cell is a biconcave disk with a flattened center - in other words, both faces of the disc have shallow bowl-like indentations (a red blood cell looks like a donut).
Red cells contain a special protein called hemoglobin, which helps carry oxygen from the lungs to the rest of the body and then returns carbon dioxide from the body to the lungs so it can be exhaled. Blood appears red because of the large number of red blood cells, which get their color from the hemoglobin. The percentage of whole blood volume that is made up of red blood cells is called the hematocrit and is a common measure of red blood cell levels.
White Blood Cells (also called leukocytes)
White blood cells protect the body from infection. They are much fewer in number than red blood cells, accounting for about 1 percent of your blood.
The most common type of white blood cell is the neutrophil, which is the "immediate response" cell and accounts for 55 to 70 percent of the total white blood cell count. Each neutrophil lives less than a day, so your bone marrow must constantly make new neutrophils to maintain protection against infection. Transfusion of neutrophils is generally not effective since they do not remain in the body for very long.
The other major type of white blood cell is a lymphocyte. There are two main populations of these cells. T lymphocytes help regulate the function of other immune cells and directly attack various infected cells and tumors. B lymphocytes make antibodies, which are proteins that specifically target bacteria, viruses, and other foreign materials.
Platelets (also called thrombocytes)
Unlike red and white blood cells, platelets are not actually cells but rather small fragments of cells. Platelets help the blood clotting process (or coagulation) by gathering at the site of an injury, sticking to the lining of the injured blood vessel, and forming a platform on which blood coagulation can occur. This results in the formation of a fibrin clot, which covers the wound and prevents blood from leaking out. Fibrin also forms the initial scaffolding upon which new tissue forms, thus promoting healing.
A higher than normal number of platelets can cause unnecessary clotting, which can lead to strokes and heart attacks; however, thanks to advances made in antiplatelet therapies, there are treatments available to help prevent these potentially fatal events. Conversely, lower than normal counts can lead to extensive bleeding.
In the 4. question as you recommended for two component, the others are optional for you...
hopes it's help...
sorry for the delay...