The bulk of the blood is diverted to the "functional" tissues (heart and brain). What are the 3 shunts in fetal circulation? What vein brings nutrient and oxygen-rich blood from the placenta to the fetus?
During fetal circulation, what opening in the septum, between the right and left atria, directs most of the blood so that it bypasses the fetal lungs? During pregnancy, what happens to the oxygenated blood returned from the placenta via the umbilical vein? a. It flows into the inferior vena cava. b.
severe blood or fluid loss makes the heart unable to pump enough blood to the body. This type of shock can cause many organs to stop working, Can be caused by bleeding from cuts In fetal circulation, what is the opening between the right and left atria called?
The mixing of fetal and maternal blood occurs in the placenta. The circle of Willis is an example of an anastomosis. The walls of the arteries are much thicker than the veins. the innermost layer of a blood vessel is the tunica intima. Which types of arteries are also called conducting arteries and include the aorta? a. arterioles. b. venules.
The mixing of fetal and maternal blood occurs in the placenta.
Veins are the only blood vessels to contain semi lunar valves.
The circle of Willis is an example of an anastomosis.
Describe the route of an RBC traveling from the heart to the left elbow and back to the heart. From the heart, the RBC will enter the ascending aorta and then the aortic arch. The RBC will exit the aorta through the left subclavian artery, continue on that route through the axillary artery and into the brachial artery.
Capillaries are the sites of exchange between the tissues and the blood. Venules drain the capillaries and begin the path back to the heart. Venules merge to form veins (and ultimately, vena cava) that carry the blood to the heart. Veins have much less smooth muscle than arteries.
Arterioles have little elastic tissue, but can change diameter quickly because of the smooth muscle in their wall. they are the major sites of regulation of blood pressure and distribution. Arterioles feed into capillary beds. Capillaries are the sites of exchange between the tissues and the blood.
Blood is carried away from the heart in arteries. All arteries have an outer tunica externa (mostly elastic and collagen fibers), an inner tunica media (mostly smooth muscle and elastic fibers) and the tunica interna (endothelial tissue). Large diameter arteries have more elastic fibers than smooth muscle in their walls ...
Large diameter arteries have more elastic fibers than smooth muscle in their walls and conduct blood to regions of the body, e.g. the subclavian artery carries blood toward the upper extremity. As arteries enter a body region, they branch and their diameters decrease. Their walls have more smooth muscle than elastic tissue.
This type of shock can cause many organs to stop working, Can be caused by bleeding from cuts. bleeding from other injuries, and internal bleeding, such as in the gastrointestinal tract.
Identify and discuss the factors that contribute to systemic vascular resistance. 1) Blood viscosity is dependent on the ratio of formed elements and proteins to plasma. In general, increased viscosity, via increased formed elements or decreasing plasma volume, increases resistance.