Circulatory System

Body System


The circulatory system delivers oxygen, nutrients, molecules, and hormones. It also removes carbon dioxide, ammonia.

Relationship between Structures and Functions

Arteries have thick layers of elastic and muscular fibers to help pump the blood, has a narrow lumen to maintain the high pressure. Veins have thin walls to help push the blood to the heart, thin outer layer to maintain the pressure low, wide lumen to put the slow flowing blood. Capillaries walls are thick so it can keep distance for diffusion small, very narrow lumen so many can fit in a small space.

Route of Blood Through Heart

The blood goes through large veins to get to the heart. Blood flows through the right atrium into the right ventricle through the open tricuspid valve.


Blood: connective tissue

Plasma: lipid and phospholipid

Erythrocytes: lipids and proteins

Leukocytes: neutrophils, eosinophils, and basophils

Platelets: prevents it from bleeding


Arteriosclerosis is the fat deposits in the arteries and it causes the walls to stiffen and thicken. Signs of arteriosclerosis are chest pain shortness of breath, fatigue, pain in the legs and the arms. Prevalence is in teenagers and young adults. Treatments include changing current lifestyle, medication, and surgery.

Hypertension (high blood pressure)

Hypertension is also called high blood pressure, and it causes the heart to work harder. Most people who have high blood pressure don't know they even have it. There are symptoms like sever headache, fatigue or confusion, vision problems, chest pain, and difficulty breathing. 1 out of every 3 adult have the prevalence of occurring. Changing lifestyle to lower the blood pressure and eating healthier diet with less salt is a treatment for hypertension.