ENTER SUBJECT
Got essays up the wazoo? Then you have found the right site. With over 45,000 essays, reports, and papers in our database, we are the
busy student's best friend. Get instant access and download all the essays you will ever need for one low price! Don't wait any longer...
that essay isn't going to write itself. So click the button below and join today.
Here is a free sample excerpt of the essay
The Circulatory System
Part I of Essay
is the course taken by the blood through the
arteries, capillaries, and veins and back to the heart. In humans, the
heart is made up of four chambers the right and left auricles, or atria,
and the right and left ventricles. The right side of the heart pumps
oxygen-poor blo .... Part II of Essay
.... closes during contraction of the ventricle. In its passage
through the lungs, the blood is oxygenated, then it is brought back to the
heart by the four pulmonary veins, which enter the left auricle. When this
chamber contracts, blood is forced into the left ventricle and then by
ventricular contraction into the aorta. The bicuspid, or mitral valve
prevents the blood from flowing back into the auricle, and the semilunar
valves at the beginning of the aorta stop it from flowing back into the
ventricle. Similar valves are present in the pulmonary ....
| Membership Option |
Price |
Join |
| 30 days (recurring) |
$19.95 |
| 90 days (recurring) |
$39.95 |
| 180 days (non-recurring) |
$69.95 |
|
|
|
Words: 1335 - Pages: 5
|
