Lumen
Aorta
Capillaries is the answer in this question
The intima
The dorsal blood vessel is located on top of the intestinal track in a worm.
lumen - the central opening within a tube or hollow organ.
The opening through which menstrual flow flows is the vaginal opening. Menstrual flow leaves the uterus via the cervix and then passes through the vaginal canal.
False. The mothers blood flows through the placenta in vessels next to the foetal blood that flows in separate vessels. Oxygen and nutrients can flow from the mothers blood into the foetus' blood and carbon dioxide and waste products can flow from the foetus' blood to the mother's blood through the vessel membranes, however the two bloods will never actually mix.
Lumen
resistance occurs as the blood flows away from heart through the vessels in the peripheral systemic circulation a term known as peripheral resistance. Viscosity of the blood (thickness) ,vessel length (distance) and vessel diameter (blood vessel radius) are three factors
Vent
Connective tissue flows through the heart and blood vessels.
The average velocity of the blood as it flows through a capillary is 0.00047 m/s.