PLEASE HELP I'll MARK THE BRAINLIEST1.) A vessel that carries oxygen-rich blood to the heart muscle is called a(n): *A.) Coronary ArteryB.)

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PLEASE HELP I'll MARK THE BRAINLIEST1.) A vessel that carries oxygen-rich blood to the heart muscle is called a(n): *A.) Coronary ArteryB.) VeinC.) VentricleD.) Atrium2.) A group of cells that receives messages about the body's oxygen needs and sends out signals to adjust the heart rate is called the: *A.) AtriumB.) Lymph NodeC.) ValveD.) Pacemaker3.) Blood components that helps the body control bleeding are: *A.) HemoglobinB.) Red Blood CellsC.) White Blood CellsD.) Platelets4.) Plasma is mostly composed of: *A.) Blood CellsB.) WaterC.) ProteinsD.) Hemoglobin5.) Which of the following is NOT a characteristic of a vein? *A.) Valves prevent backward flow of bloodB.) Returns blood to the heartC.) Walls are one cell thickD.) Walls are generally thinner than those of arteries6.) The largest artery in the body is called the: *A.) AortaB.) AtriumC.) PacemakerD.) Coronary Artery7.) The network of vessels that returns fluid to the bloodstream is called the: *A.) Lymphatic SystemB.) VeinsC.) ArteriesD.) Circulatory System8.) Hemoglobin is a protein that binds easily to: *A.) White Blood CellsB.) OxygenC.) FibrinD.) Platelets9.) Which of the following structures pumps blood into arteries leading to the lungs? *A.) Right AtriumB.) Left AtriumC.) Right VentricleD.) Left Ventricle10.) Which of the following structures is NOT part of the cardiovascular system? *A.) HeartB.) Blood VesselsC.) BrainD.) Blood11.) True/False: The force of the heart's contracting atria causes blood pressure. *A.) TrueB.) False12.) True/False: Capillary walls must be very thick to withstand the high force of blood pumped by the heart. *A.) TrueB.) False13.) True/False: White blood cells defend the body against disease. *A.) TrueB.) False14.) True/False: Blood travels in two directions in the body. *A.) TrueB.) False15.) True/False: Blood types are determined by proteins known as marker molecules that are on red blood cells. *A.) TrueB.) False16.) Fill in the Blank: The right and left  are the two lower chambers of the heart. *17.) Fill in the Blank: A sphygmomanometer is an instrument that measures . *18.) Fill in the Blank: A flap of tissue that prevents blood from flowing backward is a(n) . *19.) List two of the three main roles of the cardiovascular system: *20.) Tell me anything else that you learned in science about the cardiovascular system:

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Answers:1.)- Coronary Artery2.)- Pacemaker3.)- Red Blood Cells4.)- Water5.)- Walls are one cell thic...

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