Question

please give my answer I will mark in the brain list ​

Answer 1

Ans 4

Answer:

Ans 1 the colour of blood is red because of hemoglobin present in blood cells . hemoglobin attracts iron molecules, and when oxygen is added to the blood cells ,the iron and oxygen react and the reaction gives out red light that is seen by our eyes.

Ans 2The pulmonary arteries and the pulmonary veins art the vessels of the pulmonary circulation; which means they are responsible for carrying the oxygenated blood to the heart from the lungs and carrying the deoxygenated blood from the heart to the lungs.

Ans 3The tricuspid and mitral valves lie between the atria and ventricles. The aortic and pulmonic valves lie between the ventricles and the major blood vessels leaving the heart. The heart valves work the same way as one-way valves in the plumbing of your home. They prevent blood from flowing in the wrong direction.

Ans 5Your pulse is your heart rate, or the number of times your heart beats in one minute. Pulse rates vary from person to person. Your pulse is lower when you are at rest and increases when you exercise (more oxygen-rich blood is needed by the body when you exercise)

Ans 6an instrument for measuring blood pressure, typically consisting of an inflatable rubber cuff which is applied to the arm and connected to a column of mercury next to a graduated scale, enabling the determination of systolic and diastolic blood pressure by increasing and gradually releasing the pressure in the cuff.