Vena Cava is a large vein that carries blood from other parts of the body to the heart. The superior vena cava and the inferior vena cava are the two parts of the vena cava. Blood is carried from the head, neck, arms, and chest by the superior vena cava. The inferior vena cava transports blood from the legs, feet, and abdominal and pelvic organs. The vena cava is the body’s largest vein.
Source: NCI Dictionary of cancer terms. (n.d.). National Cancer Institute. https://www.cancer.gov/publications/dictionaries/cancer-terms/def/vena-cava

When we say capillary, the walls of these tiny blood vessels are very thin. The blood’s oxygen and nutrients can pass through the walls and into the organs and tissues. Waste products are also removed from your tissues by capillaries. Oxygen and nutrients are exchanged for carbon dioxide and waste in capillaries.
Source: Blood vessels: Types, anatomy, function & conditions. (n.d.). Cleveland Clinic. https://my.clevelandclinic.org/health/body/21640-blood-vessels#:~:text=Capillaries%3A%20These%20tiny%20blood%20vessels,for%20carbon%20dioxide%20and%20waste

Arteries are thin, muscular tubes that transport oxygenated blood from the heart to all parts of the body. The aorta is the largest artery in the body. It originates in the heart and travels up the chest (ascending aorta) before entering the stomach (descending aorta).
Source: Circulatory system: Anatomy and function. (n.d.). Cleveland Clinic. https://my.clevelandclinic.org/health/body/21775-circulatory-system#:~:text=Arteries%3A%20Arteries%20are%20thin%2C%20muscular,the%20stomach%20(descending%20aorta)