Term
| What are the two components of the circulatory system? |
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Definition
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Term
| What compoenents make up the cardiovascular system? |
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Definition
| Systemic and pulmonary circuit |
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Term
| Which heart chambers are involved with the systemic circuit? |
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Definition
| Left Atrium, Left Ventricle, Aorta+arteries |
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Term
| Which heart chambers are involved with the pulmonary circuit? |
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Definition
| Right atrium, Right ventricle |
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Term
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Definition
| Nerves that innervate heart |
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Term
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Definition
| Vlood vessels that supply nutrients to heart |
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Term
| What constitutes to Tunica Intima? |
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Definition
Squamous endothelium
Basement Membrane
Lamina Propria |
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Term
| What layers comprise tunica media? |
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Definition
interal elastic membrane
external elastic membrane
collagen fibers |
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Term
| Which types of arteries experience the highest BP? |
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Definition
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Term
| What are the different types of arteries? |
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Definition
| muscular, elastic, arterioles |
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Term
| What are the different types of veins? |
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Definition
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Term
| Describe the structure of capillaries |
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Definition
Single endothelial layer connected by tight junctions
Surrounded by pericyte |
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Term
| How do capillaries repair from damage? |
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Definition
| Surrounding pericytes can differentiate into smooth muscle, endothelial, or fibroblast to repair damage |
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Term
| How do nutrients cross from tight capillary to tissues? |
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Definition
Tight junctions are not very permeable
Must be transported by endosomes |
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Term
| Which capillary type contains a diaphragm? |
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Definition
| Fenestrated. Diaphragm is a membrane covering pores |
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Term
Describe the structure of a sinusoidal capillary
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Definition
Largest fenestrations
No diaphragm
No endosomes |
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Term
| What is the difference between Lymph vessels and venules? |
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Definition
| Lymph vessels are empty, or only carry lymphocytes |
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Term
| Describe the path of blood starting from the left ventricle |
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Definition
| LV->Semilunar->Aorta->Arteries->vessels->Superior and Inferior venacavae->RA->Tricuspid->RV->Semilunar->Pulmonary artery->lungs |
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Term
| What happens during diastole? |
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Definition
Heart relaxes
Blood fills atrium (and ventricles passively)
AV valves open |
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Term
| What hapens during systole? |
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Definition
Atria briefly contract to move blood to ventricle
Ventricle contracts
Semilunar valves open
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Term
| What triggers the atria to contract? |
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Definition
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Term
| Describe the path of electrical conduction of the heart |
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Definition
| SA node->AV node->AV bundle-> R + L Bundle of His->Purkinje fibers |
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Term
| True or false: nodes of the heart are modified nervous tissue cells |
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Definition
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Term
| What is the outermost layer of Tissue surrounding the heart? |
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Definition
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Term
| What kind of connective tissue makes up the fibrous pericardium? |
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Definition
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Term
| What layer is directly in contact with the heart? |
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Definition
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Term
| What is the name of the middle layer of CT surrounding the heart? |
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Definition
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Term
| What are the layers of the heart wall |
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Definition
epicardium (adventitia)
Myocardium (media)
Endocardium (intima) |
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Term
| Are cardiac cells multinucleated or mononucleated? |
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Definition
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Term
| What is an intercalated disk? |
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Definition
| the junction between 2 myocardiocytes |
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Term
| What types of junctional complexes are found on the horizontal region of the intercalated disk? |
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Definition
| tight junctions/desmosomes |
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Term
| What types of junctional complexes are found on the vertical region of the intercalated disk? |
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Definition
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Term
| What is ANP? What does it do |
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Definition
Hormone secreted from atrial myocardial cells
Lower BP |
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Term
| Describe the structure of purjinke fibers |
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Definition
Modified myocardial cell
Less myofibrils
More mitochondria
Glycogen
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