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Cardiovascular System - Human Veins, Arteries, Hearthead and neck. External Carotid Artery. The external carotid artery flows upward on the side of the head to branch into various structures in the neck, face, jaw, scalp, and base of the skull. The main vessels that originate from this artery are: (1) the superior thyroid artery, to the hyoid bone, larynx, and thyroid gland; (2) the lingual artery, to the tongue, muscles of the tongue, and salivary glands below the tongue; (3) the facial artery, to the pharynx (throat), palate, chin, lips, and nose; (4) the occipital artery, to the scalp on the back of the skull and various muscles in the neck; and (5) the posterior auricular artery, to the ear and scalp over the ear. The external carotid artery terminates by division into the maxillary and superficial temporal arteries. It provides oxygenated blood to the pharynx (throat), palate, chin, lips, and nose.
It returns deoxygenated blood from the pharynx (throat), palate, chin, lips, and nose back to the heart. It has many curvatures in different parts of its path. When it passes through the carotid canal and the side of the body of the sphenoid bone, it has double curvature and looks like the italic letter S. At this point it will goes into the carotid canal, which is located in the temporal bone's petrous portion. The internal carotid artery rests on the external carotid artery's outer side at first and then it goes behind it. The internal carotid artery starts is in the superior carotid triangle and as it rises, it lays deeper, under the parotid gland, the digastric muscle's posterior belly, stylopharyngeus and stylohyoid muscles and styloid process.
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The posterior and occipital auricular arteries and the glossopharyngeal and.. The external jugular vein passes over the sternocleidomastoid. It starts in the parotid gland. Where the retromandibular vein divides posteriorly and the posterior auricular vein connects with it, it forms the external jugular vein. This vein gets the majority of the blood from the cranium’s exterior and the face’s deeper portions. This is the smaller of the two internal jugular veins. The internal jugular veins return deoxygenated blood from the head to the heart.
The human body is an amazing structure made up of many fascinating parts and systems. Learn about the human body and how its systems work together.
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The left internal jugular vein curves forward and joins the subclavian vein, and then crosses over the left common carotid artery at the neck’s root. The parotid gland is where the external jugular vein starts.
Smithsonian Institution's journey through five million years of human evolution. Skin acts as a waterproof, insulating shield, guarding the body against extremes of temperature, damaging sunlight, and harmful chemicals. Map of the Human Heart. Day and night, the muscles of your heart contract and relax to pump blood throughout your body. In the Step Thru below, see the complicated.
It’s formed where the posterior auricular vein and the retromandibular vein’s posterior separation meet. This vein gets the majority of the blood from the cranium’s exterior and the face’s deeper portions.
The subclavian vein receives the external jugular vein’s drainage. It returns the deoxygenated blood from the head to the heart.
The left jugular vein lies deep inside the neck and is seldom injured. It later unites to create the basilar artery in a complex named the vertebrobasilar system. This system provides important areas of the brain with blood.
It goes to the upper six cervical vertebrae's transverse processes to the skull by going up into the foramina. It enters the skull by way of the foramen magnum, in front of the ligamentum denticulatum's uppermost tooth. Then above it turns between the hypoglossal nerve and below, the first cervical nerve, and continues to the medulla oblongata's anterior surface. It forms the basilar artery by uniting with the other side at the lower border of the pons. Here it becomes intracranial. It takes in deoxygenated blood through the veins and delivers it to the lungs for oxygenation before pumping it into the various arteries (which provide oxygen and nutrients to body tissues by transporting the blood throughout the body). The heart is located in the thoracic cavity medial to the lungs and posterior to the sternum.
On its superior end, the base of the heart is attached to the aorta, pulmonary arteries and veins, and the vena cava. The inferior tip of the heart, known as the apex, rests just superior to the diaphragm. The base of the heart is located along the body’s midline with the apex pointing toward the left side. Because the heart points to the left, about 2/3 of the heart’s mass is found on the left side of the body and the other 1/3 is on the right...
It's a device that is battery operated and can sense when the heart beat is irregular or too slow. The pacemaker will send a message to the heart to help it beat at the proper pace. It's made up of two parts: the generator and the leads.
The generator holds the battery and the knowledge to control heartbeats. The leads, or wires, link the generator to the heart and send messages electronically to the heart. The pacemaker is placed in the body, under the skin. The generator usually goes below the collarbone, on the left side of the chest. The leads enter the vein and the heart but connect to the generator. The heart is a muscle that is capable of continuous pumping throughout our lifetime.
Under ordinary circumstances, this pumping is regular and full. Unfortunately, many diseases and chemicals are capable of influencing the heart and able to produce abnormal rhythms, referred to as arrhythmias... The heart is about the size of a fist but delivers a more powerful punch. Fortunately, it contains a buffer zone to decrease the force of these beats, or we would be shaken by each one. This buffer zone also protects the heart from outside injury and keeps it from scraping against the chest wall. Myth has it that the heart is the seat of the emotions, but it is actually a pump which circulates the blood throughout the body.
The Medical Dictionary reports that the heart beats more than 2. The aorta also has the thickest walls of any blood vessel in the body. This artery ascends superiorly from the left ventricle of the heart, arches over the heart and to the back and to the left, and descends inferiorly behind the heart just anterior to the spinal column. Following the aorta from its origin at the left ventricle of the heart, the first section of the aorta is known as the ascending aorta. The ascending aorta branches into the left and right coronary arteries.
The coronary arteries carry blood to the surface of the heart so that it has oxygen and nutrients to keep beating. The second portion of the aorta, the aortic arch, branches into three major arteries: the brachiocephalic trunkthe left common carotid arterythe left subclavian artery. The brachiocephalic trunk..
All of the blood delivered from the heart to the systemic tissues of the body passes through the aorta, making it the largest artery in the human body. As the aorta extends from the heart, it begins as the ascending aorta before turning 1. From the arch the aorta passes posterior to the heart and descends through the thorax and abdomen as the descending aorta. Three major arteries branch off from the superior arterial wall of the aortic arch to supply blood to the tissues of the superior regions of the body: the brachiocephalic trunk, left common carotid artery, and left subclavian artery. The brachiocephalic trunk is the first artery to arise from the aortic arch, carrying blood to the right arm and the right side of the head and neck. Next to branch from the aorta.. The brachiocephalic artery supplies blood to the tissues of the brain and the head.
It is the first branch of the aortic arch and rises up to a point near the junction of the sternum (breast bone) and the right clavicle (collarbone). At this point, it divides, giving rise to the common carotid artery, which carries blood to the right side of the neck and head, and the right subclavian artery, which leads to the right arm. It collects blood from veins serving the tissues inferior to the heart and returns this blood to the right atrium of the heart. Although the vena cava is very large in diameter, its walls are incredibly thin due to the low pressure exerted by venous blood. The inferior vena cava forms at the superior end of the pelvic cavity when the common iliac veins unite to form a larger vein.
From the pelvis, the inferior vena cava ascends through the posterior abdominal body wall just to the right of the vertebral column. Along its way through the abdomen, blood from the internal organs joins the inferior vena cava through a series of large veins, including the gonadal, renal, suprarenal and inferior phrenic veins. The hepatic vein provides blood from the digestive organs of the abdomen after it has passed through the hepatic portal system in the liver. Blood from the tissues of the lower back, including the.. Within the neck, the left common carotid artery extends out into the left external carotid artery and the left internal carotid artery. It can be found at the lowest section of the small depression known as the hilum of the lung, and often feeds directly into the left atrium of the heart. It begins at the height of the fourth thoracic vertebra and runs along the superior mediastinal cavity to the base of the neck before arching across the body to the edge of the Scalenus anterior.
It plays a vital role in pulmonary circulation by conducting deoxygenated blood from the heart to the lungs. The pulmonary trunk and its branches, the pulmonary arteries, are the only arteries in the human body that carry deoxygenated blood instead of oxygenated blood.
Anatomy. The pulmonary trunk is a large artery superior to the right ventricle of the heart and anterior to the aorta. It is widest where it divides into the pulmonary arteries, measuring about 1 inch (2. The pulmonary trunk arises from the heart at the pulmonary valve and extends superiorly, posteriorly, and slightly to the left.
At its superior end it divides into the left pulmonary artery and the right pulmonary artery, which continue toward the left and right lungs, respectively. The walls of the pulmonary trunk are extremely thick to withstand the high pressure exerted by blood as it exits..
Within the neck, the right common carotid artery branches out into the right external carotid artery and the right internal carotid artery.