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More biology questions any ideas?

Which of the following is the correct order of blood flow in the circulatory system ?

- artery capillary vein

- vein capillary artery

-artery vein capillary

-vein artery capillary

Antibodies are proteins produced in response to

- antigens

- immunity

- memory cells


How does an oocyte get to the uterus?

- It swims there using its flagellum.

-It is already there: development of the oocyte occurs there.

-It is pushed there by the cilia in the uterine tube.

-It is ovulated directly into it.

3 Answers

  • 1 decade ago
    Favorite Answer

    (1)The superior (a) and inferior (b) vena cava are the main veins that receive blood from the body. The superior vena cava drains the head and arms, and the inferior vena cava drains the lower body.

    The right atrium receives blood from the body via the vena cavae. The atria are on the top in the heart.

    The blood then passes through the right atrioventricular valve, which is forced shut when the ventricles contract, preventing blood from reentering the atrium.

    The blood goes into the right ventricle (note that it has a thinner wall; it only pumps to lungs). The ventricles are on the bottom of the heart.

    The right semilunar valve marks the beginning of the artery. Again, it is supposed to close to prevent blood from flowing back into the ventricle.

    The pulmonary artery or pulmonary trunk is the main artery taking deoxygenated blood to the lungs.

    Blood goes to the right and left lungs, where capillaries are in close contact with the thin-walled alveoli so the blood can release CO2 and pick up O2.

    From the lungs, the pulmonary vein carries oxygenated blood back into the heart.

    The left atrium receives oxygenated blood from the lungs.

    The blood passes through the left atrioventricular valve.

    The blood enters the left ventricle. Note the thickened wall; the left ventricle must pump blood throughout the whole body.

    The blood passes through the left semilunar valve at the beginning of the aorta.

    The aorta is the main artery to the body. One of the first arteries to branch off is the coronary artery, which supplies blood to the heart muscle itself so it can pump. The coronary artery goes around the heart like a crown. A blockage of the coronary artery or one of its branches is very serious because this can cause portions of the heart to die if they don’t get nutrients and oxygen. This is a coronary heart attack. From the capillaries in the heart muscle, the blood flows back through the coronary vein, which lies on top of the artery.

    The aorta divides into arteries to distribute blood to the body.

    Small arteries are called arterioles.

    The smallest vessels are the capillaries.

    These join again to form venules, the smallest of the veins.

    These, in turn, join to form the larger veins, which carry the blood back to the superior and inferior vena cava.

    (2) antigens

    (3) its already there: it occurs there

    Source(s): nurse
  • 1 decade ago

    1. artery->capillary->vein

    2. antigens

  • 1) If you are talking blood flow away from the heart (which is the common pathway: artery->capillary->vein... although technically it is arteries->arterioles->capillaries->venules-> veins.

    2) Antigen

    3) It is ovulated directly into it.

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