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The pressure is highest in the large arteries and continues to drop throughout the pathway, reaching zero or negative pressure at the venae cavae. This role of transportation is undertaken by the human circulatory system, moving essential nutrients and minerals throughout the body and metabolic waste products away from the body. Your quiz over the cardiovascular system will be next Tuesday. The right lung is larger and contains three lobes, whereas the smaller left lung contains two lobes (Figure 11. The cardiac cycle, also known as the heartbeat, begins with deoxygenated blood collecting in the right atrium. File type: Word, PDF. Protective Mechanisms. In other words, if the cell were very large or thick, diffusion would not be able to provide oxygen quickly enough to the inside of the cell. As air crosses these surfaces of the mucous membranes, it picks up water. Circulatory system questions (practice. You will first take your pulse while you are sitting still, then you will do some light exercise such as walking or side bends, then we will go out and you can do some vigorous exercise such as running or running up stairs. The cardiac cycle is the flow of blood through the heart coordinated by electrochemical signals that cause the heart muscle to contract and relax. Regulation by altering blood volume B. Renin – hormonal control As blood pressure and/ or volume increases beyond normal, the kidneys allow more water to leave the body in urine. Special circulations. Infarction is a "heart attack".

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Various substances such as drugs and hormones can cause increases or decreases. Which of the following statements about the mammalian respiratory system is false? Thin-walled vessel that carries blood from body tissues and lungs back to the heart. Chapter 10 cardiovascular system exam. Each bronchus divides into secondary bronchi, then into tertiary bronchi, which in turn divide, creating smaller and smaller diameter bronchioles as they split and spread through the lung. File type: Microsoft Word. Next: Take notes on a piece of paper or in your notebooks.

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Blood returned to the left side of the heart is pumped. The heart consists of four chambers, four one-way valves, and a set of arteries and veins that regulate the normal flow of blood within the body. Electrical impulses pass from the pacemaker (SA node) through the AV node and the atrioventricular bundle or bundle of His towards the ventricles. Veins draining the head and arms empty into the superior vena cava, and those draining the lower body empty into the inferior vena cava. 3) The common hepatic artery supplies the liver. Chapter 11 the cardiovascular system answer key. Guard the bases of the. The myocardium requires a constant supply of oxygen and nutrients to maintain the contractions and relaxations that keep the heart pumping. Largest type of blood vessel.

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They begin at the dorsal venous arch in the foot and travel up the medial aspect of the leg to empty into the femoral vein in the thigh. Cardiovascular system chapter 13 answer key. Two systems act to regulate heart activity: 1. Warm up: Answer the following question in your notebooks: 1) How do you think blood gets pumped into and around the heart? This is the layer of the. However, it is possible to override this automatic regulation for activities such as speaking, singing and swimming under water.

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Arterial Branches of Ascending Aorta and Aortic Arch: The only branches of the ascending aorta are the right (R. ) and left (L. ) coronary arteries, which serve the heart. Platelets are cells that help to form clots and stop bleeding. It has three (3) leaflets or cusps. Lungs: Bronchi and Alveoli. Carbon dioxide exits the cells, enters the bloodstream, travels back to the lungs, and is expired out of the body during exhalation. Anatomy 10.jpg - Chapter 11 The Cardiovascular System 209 Figure 11-2 is an anterior view of the heart. Identify each numbered structure and write its | Course Hero. The smooth muscle can contract, decreasing the trachea's diameter, which causes expired air to rush upwards from the lungs at a great force. Along the evolutionary tree, different organisms have devised different means of obtaining oxygen from the surrounding atmosphere. Air enters the lungs through the primary bronchi. Causes heart muscle depolarization from the atria to. Insects have a highly specialized type of respiratory system called the tracheal system, which consists of a network of small tubes that carries oxygen to the entire body. Approximately the size of. A pacemaker is a small. The brachiocephalic trunk (first branch off the aortic arch) splits into the R. common carotid artery and R. subclavian artery.

The hepatic veins drain the liver. Autonomic nervous system – brakes and accelerator. Neural (ANS) Control. Study Guide Answers. The trachea is lined with cells that have cilia and secrete mucus. If the flatworm had a cylindrical body, then the cells in the center would not be able to get oxygen. Diastolic – pressure when ventricles relax 3. Upload your study docs or become a.

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