Tag: blood vessels
- Blood Pressure ()
Blood pressure is a standard vital sign that the EMS crew will collect for nearly all patients. Generally speaking, EMS concerns about blood pressure tend to end with the systolic blood pressure. As a whole, the EMS community is not terribly concerned with hypertension (high blood pressure), but extremely concerned with hypotension (low blood pressure). […]
- Microcirculation ()
Capillaries do not function independently. The capillary bed is an interwoven network of capillaries that supplies an organ. The more metabolically active the cells, the more capillaries required to supply nutrients and carry away waste products. A capillary bed can consist of two types of vessels: true capillaries, which branch mainly from arterioles and provide […]
- Forces That Move Blood Through Capillaries ()
The capillary is the site of fluid exchange with the body’s tissues. This fluid transfer is moderated by two factors: hydrostatic pressure and osmotic pressure. Hydrostatic pressure is the “pushing” force on water due to the presence of more fluid in one region than another. In general, larger fluid volumes generate higher hydrostatic pressure. Osmotic […]
- More Tissue & Cell Exchange ()
Blood Reservoir More than 60 per cent of all the blood in the circulatory system is usually in the veins. For this reason and also because the veins are so compliant, it is said that the venous system serves as a blood reservoir for the circulation. When blood is lost from the body and the […]
- Respiratory System – More Structures ()
The phrenic nerve originates from the spinal cord at C3 through C5 and traverses the neck, heart, and lungs to reach the diaphragm and terminate into right and left branches at the subclavian artery. The left phrenic nerve innervates the left diaphragmatic dome, and the right phrenic nerve innervates the right diaphragmatic dome, with the […]
- Threats To Perfusion ()
Perfusion is the passage of fluid through the circulatory system (blood stream) or lymphatic system to an organ or a tissue, usually referring to the delivery of blood to an area. Obviously, since the circulatory system transports oxygen and vital nutrients to the body’s cells, any interruption would result in certain death for millions of […]
- Tissue and Cell Exchange ()
Air enters the body through the mouth or nose and quickly moves to the pharynx, or throat. From there, it passes through the larynx, or voice box, and enters the trachea. The trachea is a strong tube that contains rings of cartilage that prevent it from collapsing. Within the lungs, the trachea branches into a […]
- How Blood Moves Through The Body ()
Blood Flow Away from the Heart As the heart pumps, blood is pushed through the body through the entire circulatory system. Oxygenated blood is pumped away from the heart to the rest of the body, while deoxygenated blood is pumped to the lungs where it is reoxygenated before returning to the heart. With each rhythmic […]
- Blood Vessels ()
Blood vessels are the channels or conduits through which blood is distributed to body tissues. The vessels make up two closed systems of tubes that begin and end at the heart. One system, the pulmonary vessels, transports blood from the right ventricle to the lungs and back to the left atrium. The other system, the […]