Category: AEMT
- Anatomical Terms ()
Directional terms Directional terms describe the positions of structures relative to other structures or locations in the body. Directional terms are used solely for comparison. Superior or cranial – toward the head end of the body; upper (example, the hand is part of the superior extremity). Inferior or caudal – away from the head; lower […]
- 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 […]
- Skin ()
The skin is a vital organ that covers the entire outside of the body, forming a protective barrier against pathogens and injuries from the environment. The skin is the body’s largest organ; covering the entire outside of the body, it is about 2 mm thick and weighs approximately six pounds. It shields the body against […]
- 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 ()
Blood is the fluid of life, transporting oxygen from the lungs to body tissue and carbon dioxide from body tissue to the lungs. Blood is the fluid of growth, transporting nourishment from digestion and hormones from glands throughout the body. Blood is the fluid of health, transporting disease-fighting substances to the tissue and waste to […]
- 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 […]
- How Oxygen Gets Into Your Body From The Environment ()
Our lungs are among our largest vital organs. The oxygen you breathe in goes into your lungs and passes into your blood from there. It is then transported to all the cells in your body through your bloodstream. The lungs are located in the chest region, protected by the ribs in the rib cage. Their […]
- How does the blood circulatory system work? ()
The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. The arteries carry blood away from the heart; the veins carry it back to the heart. The system of blood vessels resembles a tree: The […]
- Circulatory System Structure ()
The heart is a muscular pump that provides the force necessary to circulate the blood to all the tissues in the body. Its function is vital because, to survive, the tissues need a continuous supply of oxygen and nutrients, and metabolic waste products have to be removed. Deprived of these necessities, cells soon undergo irreversible […]