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Circulatory system

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  • T or F, SA node cause the both atria to contract; sending a signal to the AV nodes causing both ventricles to contract.
    True
  • List the functions of the circulatory system.
    transports blood, regulates body temp., delivers oxgen and nutrients to all body cells, removes wastes from cells,
  • T or F, . A group of cells located in the right atrium, called the pacemaker or sinoatrial (SA) node send signals for the heart to contract
    True
  • Which type of blood cell fight against diseases?
    white blood cells
  • Which describes arteris?
    strong, thick-wall, elastic and durable
    strong, thin-walled
    carries deoxygenated blood
    has valves
  • Which label is the RA, right atrium
    F
  • Why is blood plasma important?
    Carries products from cells and transports important substances
  • Explain how the structure of capillaires support their funcion?
    Capillary walls are only 1 cell thick, to allow easy exchange of substances via diffusion
  • What are the two different types of circulation?
    Pulmonary and Systemic
  • Which label is the RV, right ventricle
    G
  • How do RBCs move through a capillary?
    in a single-file
  • Briefly describe the pulmonary circulation.
    blood moves from the heart to the lungs and back (to the heart)
  • What are all the parts of the circulatory system?
    blood vessels and heart
  • Oxygenated blood leaves the heart from __ (it is the largest artery)
    the aorta
  • What is blood pressure?
    BP is the measure of how much pressure is exerted against the vessel walls by the blood.
  • Deoxygenated blood enters the heart from the ___.
    left ventricle
  • Explain how blood moves in veins.
    Veins are located near skeletal muscles and when these mm contract it moves the blood in veins
  • What part of the heart keeps the heart beating rhythically?
    the pacemaker, SA nodes
  • Which is the correct path for a red blood cell to take through the human circulatory system begining as it enters the heart.
    RA -> RV -> lungs -> RA ->RV
    LA -> LV -> lungs -> LA ->LV
    LA -> LV -> lungs -> RA ->RV
    LA -> RV -> lungs -> LA ->RV
  • Describe a vein.
    Blood vessels that carry deoxygenated blood to the heart
  • Which label is the LV, left ventricle
    E
  • Which blood vessle carries oxygenated blood away from the heart?
    arteries
  • Briefly describe the systemic circulation.
    blood moves from the heart to the body and back to the heart
  • Describe a capillary.
    One-cell-thick blood vessels where exchange of substances and wastes occur
  • Which label is the superior vena cava
    C
  • What is the function of platelets?
    Helps form blood clots
  • Cardiac muscle is different from skeletal muscles because ....
    it can conduct electrical impulses for muscular contractions
  • Which label is the aorta
    B
  • Which label is the LA, left atrium
    D
  • Which type of blood vessel has thin endothelial walls and carries blood with a low pressure
    veins
  • What is a pulse?
    Pulse is the number of times your heart beats (in a given amount of time)
  • ____ are microscopic blood vessels where exchange of inportand substances and wastes occur.
    capillaries
  • With every heat beat, the right side ......, while the left side .....
    Right side pumps deoxygenate blood to the lungs - Left side pumps oxygenated blood to the body
  • What is the function of Red Blood Cells?
    to carry oxygen to cells (internal respiration)
  • Which label is the inferior vena cava
    A
  • ____ carry oxygen-poor blood or deoxygenated blood back to the heart.
    veins
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