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Chapter 23 circulatory system
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Blood Pressure: The Primary Circulatory System
167 Words1 Pages
When the heart pumps the blood, it pushes up against the artery, this force is called blood pressure. If the force is too high it is called hypertension. Most often the blood pressure is tested by a healthcare worker using a gauge, sensor, or a stethoscope and they measure the systolic pressure (blood pressure when the heart beats) and the diastolic pressure (blood pressure between heartbeats). The reading is systolic over diastolic, for example, 120/80.
The heartbeat
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Veins transport blood to the heart and lungs at low pressure after receiving it from the capillaries. Valves inside the veins keep blood moving in one direction. The human body's arterial system branches out from one main artery, the dorsal aorta. Like veins, arteries have three layers: an outer layer of tissue, an inner layer of epithelial cells and a layer of muscle in between.
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The functions of the human cardiopulmonary system can be broken down into two, circulatory system and the respiratory system. The main goal of these two systems is to maintain homeostasis in our body. Homeostasis can be described as a type of condition where the internal continuity of an individual has to keep steadiness, regardless of any external changes from the outside environment. External changes from the outside environment may include factors such as excitement, stress, exercise, diet, and much more. Exercise can be carried out because the human body can endure a high level of exercise during a prolonged period of time.
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There thin walls allow oxygen, nutrients and carbon dioxide to pass through and from cells. Veins - They are blood vessels that take blood back into the heart. 2. After leaving the heart, blood goes to the lungs, where it collects oxygen. this , goes back into the heart from the lungs, and is pumped to organs through arteries.
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All of the organs in the body maintain homeostasis. The circulatory system consisting of the heart and vessels is of vital importance. The heart pumps blood and other nutrients through the vessels to all of the other organs in the body. The heart, vessels, lungs all work together to maintain homeostasis. With out the circulatory system, no other organ could survive.
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1. Explain the function of the heart, and the structure of the arteries veins and capillaries The heart is a key muscular organ, and is controlled by the autonomic nervous system. It transports blood to the body’s tissues via the circulatory system; blood provides the body with oxygen, nutrients and also assists in the removal of carbon dioxide and metabolic wastes, hormones are transported throughout the body by plasma. Arteries, arterioles, veins, capillaries and valves, are the blood vessels which are responsible for transporting the blood throughout the body.
1353 Words | 6 Pages
The cardiovascular system helps blood circulate through a network of vessels in the body to give single cells oxygen and nutrients. The cardiovascular system in our body consists of the heart and blood vessels which are further more split in to capillaries, arteries and veins. The human heart pumps the blood via the blood vessels and is split in to four sections. The right side of the heart moves poorly oxygenated blood and the left side is responsible for moving highly oxygenated blood. Oxygenated blood that is pumped throughout the body by the arteries which is then supplied to the body tissue as they need to survive.
1383 Words | 6 Pages
If a person does not have a cardiovascular system that is in good working order, it can be a fatal situation. Along with pumping blood to the body, the cardiovascular system also brings oxygen and nutrients to all of the different organs and tissues within the body. As our blood makes its circuit journey from the heart to the extremities and then back to the heart, waste is removed from the cells as well. For the cardiovascular system to function at an optimal level, it needs to be healthy and fit.
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1. List the structures and functions of the cardiovascular system. Do not forget blood and vessels are part of this system. The cardiovascular consists of the heart, blood vessels and blood. It has three functions one of them is that it transports nutrients, oxygen and hormones to cells throughout the body and removes wastes such as carbon dioxide and nitrogenous waste.
511 Words | 3 Pages
Two key components of the human body, blood pressure and heart rate, are crucial to determining how healthy a person is. Blood pressure, or the pressure of the blood in the cardiovascular system, is crucial in the human body, because it is the main transportation system that travels to and from cells. Heart rate is the speed of the heartbeat measured by beats per minute. The nervous system and brain contributes to upholding these two critical areas by monitoring and controlling them.
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How the cardiovascular system works? Image result for the cardiovascular system heart without labels The cardiovascular system consists of two circuits that blood travels through; pulmonary and systemic. Exercise has an impact on these systems, causing the heart to pump blood faster around the body, which allows you to exercise for longer.
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The Respiratory and Cardiovascular systems work together in order to complete specific roles in the body. The Respiratory System is composed of specific organs responsible for inhaling oxygen and gas exchange throughout the lungs and body tissues. The Cardiovascular System is a circulatory system that is powered by the hardest working organ in the body ,the heart, it is responsible for moving nutrients, oxygen, cellular waste products ,and hormones. “Oxygen is required for cellular functions”, (Lysis 1). The cardiovascular and respiratory system work together to assure that all organ tissues sustain sufficient oxygen.
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The smallest of all vessels are the capillaries which are one cell thick, the pressure is very low and gas exchange happens in the capillaries. A myocardial infarction (heart attack) happens when coronary arteries get blocked this effects the supply of blood and oxygen to this part of the heart which can cause the heart muscle to die off from lack of oxygen and nutrients, if the muscle has died it will be replaced with scar tissue. Atherosclerosis is where arteries become clogged with plaques or atheroma which are cholesterol and excess fatty substances, these cause the arteries to harden and do not let the proper blood supply flow which can stop organs functioning properly. These plaques can rupture which causes a blood clot, the blood clot then blocks the hearts blood supply causing the hearts muscle to be deprived of oxygen and may result in the muscle dying. After a heart attack the hearts function may not be the same some complications can be Arrhythmia (abnormal heart beats) such as Tachycardia (heart beating too fast)
2083 Words | 9 Pages
The heart is located at the center of the chest, and is surrounded by the ribcage and protected by the breastbone. The heart’s main function is to keep blood continually circulating throughout the body. Arteries are the vessels that supply the body with oxygen rich blood; on the contrary the vessels that return blood to the heart are called veins. Like any other muscle in the body, the heart depends on a steady supply of oxygen rich blood. The arteries that carry this blood supply to the heart muscle are called coronary arteries.
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The cardiovascular system is the heart and it is a four-chambered pump that carries blood to the arteries these arteries then carries out clean and oxygenated blood to the tissue. The blood Definition According to (dictionary.com 2002). Blood is the fluid that circulates in the vascular system of human beings and, in a humans blood is consisting of plasma in which the red blood cells, white blood cells and platelets are suspended.
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Hypertension and pregnancy Pathophysiology: Hypertension is a chronic elevation of blood pressure that, in the long-term, causes end-organ damage and results in increased morbidity and mortality. Blood pressure is the product of cardiac output and systemic vascular resistance. It follows that patients with arterial hypertension may have an increase in cardiac output, an increase in systemic vascular resistance, or both. There are 3 stages of hypertension: Stage 1: (systolic BP 140-159 mm Hg or diastolic BP 90-99 mm Hg): Can be treated with lifestyle modifications and, if needed, a thiazide diuretic Stage 2: (systolic BP >160 mm Hg or diastolic BP >100 mm Hg): Can be treated with a combination of a thiazide diuretic and an ACE inhibitor, an
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