Term
| What is the difference between the fibrous & serous pericardium? |
|
Definition
Fibrous – superficial – prevents overstretching, protection, anchoring for the heart
Serous – deep – parietal & visceral layers, pericardial cavity is between the layers |
|
|
Term
| What do you find in the pericardial cavity? |
|
Definition
| Pericardial fluid for lubrication |
|
|
Term
| What is the fossa ovalis? |
|
Definition
| Remnants of the foramen ovale which was a hole connecting the fetal atrias, bypassing the non-functioning lungs |
|
|
Term
| The right coronary artery branches into …. |
|
Definition
| Posterior interventricular branch, Marginal branch |
|
|
Term
| The left coronary artery branches into ….. |
|
Definition
| Anterior interventricular branch, Circumflex branch |
|
|
Term
| Name all of the autorhythmic portions of the heart and their functions. |
|
Definition
SA node=Generates the fastest action potential-determines heart rate
AV node=Slows, delays the action potential from spreading to the ventricles
Bundle of His=Only electrical connection between the atria & ventricles
Bundle branches= Distribute the depolarization over the ventricles
Purkinje fibers= Stimulate the ventricles in an inferior to superior manner |
|
|
Term
| What valve separates the right atria and right ventricle? |
|
Definition
|
|
Term
| What are chordae tendinae? |
|
Definition
| Filaments connecting the tips of the AV valves to the papillary muscles in the ventricles – prevents backflow of blood into the atrias |
|
|
Term
| What effect does the sympathetic nervous system have on heart rate? |
|
Definition
|
|
Term
| Name the 3 types of true capillaries. |
|
Definition
| Continuous, Fenestrated, Sinusoidal |
|
|
Term
| What is the difference between a conducting artery and a distributing artery? |
|
Definition
Conducting artery pumps blood has more elastic fibers
Distributing directs blood to areas of body has more smooth muscle |
|
|
Term
| Name the 3 layers that make up the wall of the artery. |
|
Definition
| Tunica interna, Tunica media, Tunica externa |
|
|
Term
| What is the function of venous valves? |
|
Definition
| Prevent backflow of blood back down the venules |
|
|
Term
| Describe how lymph is formed at the lymphatic capillaries. |
|
Definition
Fluid enters the tissue from blood capillaries
Increase volume in the tissue spread cells apart which are connected to lymphatic capillary endothelial cells via anchoring filaments
The tissue cells move which move the anchoring filaments, which move the lymphatic endothelial cells
This creates gaps between the endothelial cells
Fluid moves into the lymphatic capillaries forming lymph! |
|
|
Term
| What is the difference between primary & secondary lymphatic organs? |
|
Definition
Primary organs produce B & T-lymphocytes
Secondary organs – variety of functions, storage of lymphocytes, RBC recycling |
|
|
Term
| Name the 5 lymph trunks & the lymph ducts that they empty into. |
|
Definition
Right duct – R jugular, R subclavian, R bronchomediastinal
Left (Thoracic) duct – Both lumbar, Intestinal, L jug, L subclavian, L bronchomediastinal |
|
|
Term
| What are the functions of the spleen? |
|
Definition
|
|
Term
| Where do you find Hassall’s corpuscles? |
|
Definition
|
|
