When the baby is born its circulation needs to be changed because now the baby must breathe by own using its lungs. Increased level of pO2 causes spasm of the umbilical arteries and‚ as follows‚ decreased venous return to the right atrium. The vascular resistance in the lungs drops and all cardiac output flows through the pulmonary vessels now. Increased return to the heart through the pulmonary veins causes the raised pressure in the left atrium. As result of the changes described above foramen
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Module 7: Human Systems Review Sheet 7.01: Nervous and Endocrine Systems 1. What are the 4 lobes of the brain? Know where they are located if given a picture of the brain. - Temporal Lobe The temporal lobe is located on the side of each hemisphere‚ behind the ears. It is associated with speech‚ hearing‚ and memory skills. It houses the hippocampus (the area of the brain associated with memory) and contains the auditory centers responsible for hearing. Occipital Lobe The occipital
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Analyse The Movement Of Blood Through The Body: Blood travels or circulates through the body through sort of pipes called blood vessels. The blood is pumped in to the blood vessel for circulation by the heart. The blood vessels are of three types called arteries‚ veins and capillaries. Arteries carry blood pumped by the heart to other parts of the body. Veins return the blood to the heart for pumping. Capillaries constitute a very large network of tiny blood vessels that reach every part of the
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Heart: Atria - chambers that receive blood Ventricles - pump blood out Single Circulation Bony fishes‚ rays‚ sharks Heart consists of two chambers: one atrium and one ventricle The blood passes through the heart once in each complete circuit Ventricle contraction pumps blood to the gills Blood that leaves the heart in single circulation passes through two capillary beds before returning Double Circulation Amphibians‚ reptiles‚ mammals One pump from the right side delivers oxygen-poor
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around the use of paracetamol in treating PDA. Background In the foetal circulation‚ the primary role of the DA is to divert the ventricular output away from the lungs towards the placenta in utero by its connection between the pulmonary artery and the descending aorta. Its patency is regulated by low oxygen tension present in the foetal lung and prostaglandin‚ which is known for its vasodilating effect in the placental circulation. Prostaglandin levels are usually high as a result of placental production
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Systems Cardiovascular System - relates to the heart‚ blood vessels and circulation in the body. The cardiovascular system‚ also known as the circulatory system‚ refers to the network that transports blood throughout the body. It is composed of the heart‚ blood vessels‚ and blood. There are actually two circulatory systems: * The pulmonary circulation – sends blood from the heart to the lungs. * The systemic circulation – sends blood from the heart to all the other parts of our bodies. Blood
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BIO 169 Ch. 20 S.G. Name: __________________________ Date: _____________ 1. The anatomical region found between the lungs that extends from the sternum to the vertebral column and from the first rib to the diaphragm. A) Epicardium B) Abdominal cavity C) Pericardium D) Mediastinum E) Thoracic cavity 2. The membrane that surrounds and protects the heart is called the A) pericardium. B) pleura. C) myocardium. D) mediastinum. E) endocardium. 3. The apex of the heart is normally pointed
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Erythrocytes The images above shows the structure of haem (iron is shown in red). Images from Haemoglobin‚ BioNet The images above shows the structure of haem (iron is shown in red). Images from Haemoglobin‚ BioNet Erythrocytes‚ also known as ‘Red Blood Cells’‚ is one of the cells in our body that makes our blood. Erythrocytes are supported by many of other components in making blood. They are a disk shaped a cell which are filled with an iron contain pigment called haemoglobin . Haemoglobin
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atrium and right ventricle. Atrium are the upper chambers of the heart whereas ventricles are the lower chambers of the heart. All these chambers are separated by a tissue layer‚ called as septum. Left side of the chamber is associated with the circulation of the oxygenated blood and the right side receives the deoxygenated blood from various parts of the body. Valves There are four valves in the heart namely bicuspid valve‚
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never mixes with blood from the other side ( except in the fetus) 5) Describe the function of each heart valve. TRICUSPID VALVE- prevents blood from moving from right ventricle into right atrium during ventricle contraction‚ PULMONARY VALVE- prevents blood from moving from pulmonary trun into right ventricle during ventricular relaxation‚ MITRAL VALVE- prevents blood from moving from left ventricle into right atrium during ventricular relaxation. AORTIC VALVE- prevents blood from moving from aorta into
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