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Cardiovascular System - Human Veins, Arteries, Heart

Cardiovascular System - Human Veins, Arteries, Heart
[Continued from above] . . . The Heart The heart is a muscular pumping organ located medial to the lungs along the body’s midline in the thoracic region. The bottom tip of the heart, known as its apex, is turned to the left, so that about 2/3 of the heart is located on the body’s left side with the other 1/3 on right. The top of the heart, known as the heart’s base, connects to the great blood vessels of the body: the aorta, vena cava, pulmonary trunk, and pulmonary veins. Circulatory LoopsThere are 2 primary circulatory loops in the human body: the pulmonary circulation loop and the systemic circulation loop. Pulmonary circulation transports deoxygenated blood from the right side of the heart to the lungs, where the blood picks up oxygen and returns to the left side of the heart. Blood Vessels Blood vessels are the body’s highways that allow blood to flow quickly and efficiently from the heart to every region of the body and back again.

What is the main function of the circulatory system? One primary function of the circulatory system is the transport of oxygen from the lungs to the cells. This is why the system has two basic parts: the pulmonary circulation, which takes blood to the lungs to pick up oxygen, and systemic circulation, which takes the oxygenated blood throughout the body. Along the way, the blood picks up nutrients, attacks diseases and gathers waste for eventual elimination. Though some scientists separate the cardiovascular and the lymphatic systems, since both systems operate using the same biological pathways, many scientists categorize them together as the circulatory system. Learn more about Human Anatomy

Circulatory System Working With Other Systems! - Delta Science Write a paragraph explaining how each of the following systems are connected to the circulatory system. Nervous System: The nervous system is made up of the brain, spinal cord and nerves. The brain sends messages to the heart telling it to beat. The heart beat pumps blood throughout the body so that nutrients and oxygen can be brought to cells and waste can be removed. Digestive System: The digestive system breaks down foods and takes out needed nutrients. Muscular System: The heart is a muscle. Respiratory System: The respiratory system is how oxygen is brought into the body. Skeletal System: Marrow inside of bones produces red and white blood cells. Endocrine System: The endocrine system is where hormones are produces. Immune System: The immune system is made up of white blood cells and antibodies.

Cardiac Muscle Tissue · Anatomy and Physiology By the end of this section, you will be able to: * Describe intercalated discs and gap junctions * Describe a desmosome Cardiac muscle tissue is only found in the heart. Highly coordinated contractions of cardiac muscle pump blood into the vessels of the circulatory system. Similar to skeletal muscle, cardiac muscle is striated and organized into sarcomeres, possessing the same banding organization as skeletal muscle ([link]). Cardiac Muscle Tissue Intercalated discs are part of the sarcolemma and contain two structures important in cardiac muscle contraction: gap junctions and desmosomes. Cardiac Muscle Contractions of the heart (heartbeats) are controlled by specialized cardiac muscle cells called pacemaker cells that directly control heart rate. The wave of contraction that allows the heart to work as a unit, called a functional syncytium, begins with the pacemaker cells. Cardiac muscle is striated muscle that is present only in the heart. autorhythmicity desmosome intercalated disc

Heart and Circulatory System Listen Things That Can Go Wrong Problems with the cardiovascular system are common — more than 64 million Americans have some type of cardiac problem. But cardiovascular problems don't just affect older people — many heart and circulatory system problems affect teens, too. Heart and circulatory problems are grouped into two categories: congenital, which means the problems were present at birth, and acquired, which means that the problems developed some time after birth. Congenital heart defects. Arrhythmia. Cardiomyopathy. Coronary artery disease. Hypercholesterolemia (high cholesterol). Hypertension (high blood pressure). Rheumatic heart disease. So what can you do to halt heart and circulatory problems before they start? Date reviewed: January 2013

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