Circulatory System

mary.wheeler.yeh
Mind Map by mary.wheeler.yeh, updated more than 1 year ago
mary.wheeler.yeh
Created by mary.wheeler.yeh about 6 years ago
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Description

A closed circulatory system in humans

Resource summary

Circulatory System
  1. Heart
    1. Diagram:
      1. Size of clenches fist
        1. Between lungs, under sternum, tilted to left
          1. 4 chambers: 2 ventricles (receiving), 2 atria (pumping out)
            1. Heart rate: Child - 90 -120, Adult - 72
              1. lub-DUB sound made by valves opening and closing
                1. Valves: prevent backflow of blood - move in 1 direction
      2. Blood Vessels
        1. Arteries
          1. Arterioles
            1. Walls: Very thick (high pressure)
              1. Blood: Oxygenated
                1. Direction: From Heart To Body
            2. Veins
              1. Walls: Thick (<Arteries)
                1. Blood: Deoxygenated
                  1. Direction: To Heart From Body
                    1. Extras: Have valves
              2. Venules
                1. Capillaries
                  1. Walls: Thin - transfer nutrients, gasses, etc.
                    1. Blood: Both
                      1. Direction: Both
                2. Blood
                  1. Plasma
                    1. RBC
                      1. WBC
                        1. Platelets
                          1. Cell fragments
                            1. Clotting
                            2. Fight harmful microbes and bacteria
                              1. Part of immune system
                              2. No nucleus - biconcave (more space for gasses)
                                1. Transports gas
                                  1. Red - Haemoglobin pigment (iron component)
                                  2. Transport medium
                                    1. Clear
                                    2. Fluid Tissue
                                    3. Diseases
                                      1. High Blood Pressure (Hypertension)
                                        1. Heart Attack
                                          1. Stroke
                                      2. Transports - nutrients, oxygen to all body cells - waste substances to excretory organs
                                        1. Kidneys, lungs, skin, colon
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