Please enable JavaScript.

Coggle requires JavaScript to display documents.

Cardiovascular System (Heart (Conduction (SA node (pacemaker) generates…

- - - - Structure: dense irregular CT
      - Function: keeps heart in place, prevents overfilling
      - Location: from diaphragm to roots of big vessels
    - - Parietal layer
        
        Structure: membrane of simple squamous epi/areolar CT
        
        Location: cavity wall
      - Visceral layer
        
        Structure: membrane of simple squamous epi/areolar CT
        
        Location: on organ (heart)
      - Pericardial cavity
        
        Location: between parietal and visceral layers of peri.
        
        Structure: filled with serous fluid (lubricates heart/reduces friction)
  - - - External CT, visceral pericardium of heart
    - - Middle, muscular layer of heart responsible for pumping
    - - Inner endothelium of heart, lines chambers and valves
  - - - Structure: junctions between cells
      - Function: make strong connections, help support contraction
    - - Structure: desmosome-like structures/junctions
      - Function: strong connections, stability
  - - - Open: blood going IN
      - Valves: bicuspid (left) & tricuspid (right); between atria and ventricles
    - - Valves: aortic (left) & pulmonary (right); into ventricles
      - Open: blood going OUT
    - - Lub: AV valve closing
      - Dub: AV valve & SL valve closing
      - Diastole: time in between (rest/no contraction)
      - Systole: contraction time
- - - - Structure: largest, proximal to heart
      - Function: move blood away from heart, stretch & recoil to propel blood
    - - Structure: more muscle relative to size than other arteries, distal to elastic arteries
      - Function: constrict or dilate, take blood to organs/parts of organs
    - - Structure: smallest, 1-2 layers of smooth muscle
      - Function: constrict or dilate
  - - - Structure: have intercellular clefts (somewhat leaky)
      - Location: most common--CNS, skin, muscle
    - - Structure: have pores for exchange
      - Location: where high rate of exchange takes place--ex. small intestine, kidneys, choroid plexus
    - - Structure: large & winding
      - Location: where large items exchange--ex. red bone marrow, liver, spleen
  - - - Structure: thick tunica externa
    - - Structure: have valves (keep blood moving in one direction)
    - - Structure: smallest, 1-2 layers of smooth muscle, similar to capillaries (exchange)
- - - - Structure: bi-concave shape; contain hemoglobin
      - Function: shape increases surface area for O2, hemoglobin binds with O2
    - - Types: neutrophils, eosinophils, basophils, lymphocytes, monocytes
      - Function: role in immunity
    - - Structure: not actually cells--pieces of cytoplasm from megakaryocytes
      - Function: involved w/ blood clotting (along w/ fibrinogen)
  - - - Function: helps keep water in blood vessels
    - - Function: immunoglobulins (antibodies) & transporters for hydrophobic substances
    - - Function: involved w/ blood clotting