Question

needs assistance with biology 2

Tell me what you want to do Chapter 238:29 3e (1) Compatibility Mode] - Word tes Mailings Review View Help 9. i Which is NOT a component of human blood? a Red blood cells b. white blood cells c. cardiac muscle cells d. platelets 1. True or False: the circulatory system actually bathes cells in blood for nutrient and oxygen exchange to occur. in. Capillaries are (choose all that apply): a the largest blood vessels in our system b. the site of oxygen and nutrient exchange between the blood and tissue cells. c.not involved in the circulatory system, d. the site where cellular waste diffuses into the blood 10. Define the following terms related to the cardiovascular disease a. Blood pressure b. Systolic pressure: c. Diastolic pressure d. Hypertension e. Heart attack £ Stroke

Answer 1

9.

i. Our blood mainly composed of 4 things The Red Blood cells, white blood cells,plasma and platelets. RBCs carry oxygen to cells , WBCs produce antibody that helps us to fight agains antigen,virus bacteria, platelates help to clot the blood when there is a wound in body and plasma mainly contains water,waste , nutrients.

So the correct ans of it is the C. Cardiac muscle cells. They are found in heart and help in cardiac cycle by which the flow of blood maintain in our body.

ii. The circulatory system circulates the blood through artery and vein to provide nutrients and oxygen and to excreate out the waste product from cell. It doesnot bath the cell with blood ,if the blood get out from the vein or artery it get clot and the cell may damage.

Extracellular fluid mainly the interstial fluid bath the cells to provide nutrient and oxygen. (CSF,MILK are example)

So ans of the above question is false.

iii. Cappillaries are a network of small blood vessels. It is so small that at a time only one RBC can pass through it. It is the junction between vein and artery.By this capillaries the cell get its oxygen and nutrients from blood and the waste create by the cell diffuse into blood .

So the correct ans is Option B and D

Capillaries are small blood vessel hence option A is incorrect

Capillaries provide food and oxygen to cell and take the wastage of cell so it is a part of our circulatory sytem .hence Option C is incorrect.

10.

BLOOD PRESSURE: Our heart pumps blood to help to reach it to varrious cell in our body.Due to this pressure the blood flow in our body .when blood follows it create a pressure on the artery and the vein.this pressure is known as blood pressure.

The normal blood pressure of a human is 120/80 mmHg

Systolic pressure: In our heart we have two parts the ventricle and atrium.when the ventricle squeze blood flow from the ventricle to other parts of the body through artery.The pressure created by it is known as systolic pressure.

Diastolic Pressure: As hearts pump it continuously go under squeze and relax.when the ventricle relax the blood from parts of the body rushes heart.the pressure created by blood in the vein is called the diastolic pressure.

Systolic pressure is most important than diastolic pressure.

Hypertension: Our normal blood pressure is 120/80 mmHg .when blood pressure is more than 150/90mmHg then it is called hyper tension or high blood pressure.

Calcium stored in the blood vessel and block the flow of blood .To over come this situation blood flows get increases .Cholesterol aslo makes the hypertension.Due to tension blood pressure can be high.If blood clot inside the blood vessels then it also block the follow of blood which create the hyper tension.

Heart Attack: As a organ our heart also need oxygen.Heart also get oxygen from blood.Blood flows into the cell of the heart and provide oxygen and nutrients.When there is a clot in the blood vessels which provide the oxygen and food to heart ,the heart cells cannt receive the food and oxygen and eventually dies.this phenomenon is known as heart attack.

Stroke: Our brain needs oxygen and food to do its work. Blood provide it to brain.When there is a clot or blockage in the flow of blood to brain ,the brain cell cannt get the required oxygen and food and dies.this is called strock

Another form of strock is due to the blast of blood vessel in brain due to high blood pressure.Due to blast blood is out of the vessel and get cloted in the brain and the brain cell cannt recieve the nutrients and oxygen.