Final answer:
The term 'intravenous' pertains to within a vein, typically involving medical procedures like injections or infusions. Venoconstriction affects blood pressure, flow, and return to the heart. Edema can result from blood pooling in lower limb veins due to gravity.
Step-by-step explanation:
The term that means pertaining to within a vein is intravenous. This refers to the administration of substances directly into a vein, which allows for rapid delivery of medication or fluids. In terms of blood flow dynamics, venoconstriction increases blood pressure within the vein, blood flow within the vein, and the return of blood to the heart. Regarding the vessels, the hepatic vein drains systemic blood from the liver into the inferior vena cava. Blood in the pulmonary artery is deoxygenated, while blood in the aorta is oxygenated. Conditions such as edema can occur when blood accumulates in the veins of the lower limbs, leading to increased pressure and the pooling of fluid in the surrounding tissues.