Biology 212 Anatomy & Physiology I Dr. Thompson Blood Vessels.
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Transcript of Biology 212 Anatomy & Physiology I Dr. Thompson Blood Vessels.
Elastic (Large) Arteries: Aorta, pulmonary trunk, & their close branches
Muscular (Medium) Arteries: Distribute blood to head, limbs, & organs
Arterioles: Distribute blood within organs & tissues
Capillaries:Primary site for exchange of gases, nurients, ions, wastes, hormones, cells, etc.
Venules:Gather blood from capillaries. Also some exchange of same materials as capillaries
Small Veins:Gather blood from tissues
Medium Veins:Gather blood from head, limbs, & organs
Large Veins:Return blood to heart
Distributing (Small) Arteries: Distribute blood within organs and tissues
Entire circulatory system (heart, all vessels) lined by simple squamous epithelium called endothelium
Capillaries consist only of epithelium and very thin layer of areolar connective tissue.
Larger vessels, either veinous or arterial, also have layers of connective tissue and/or smooth muscle surrounding this endothelium.
Contraction of right ventricle provides force to drive blood through pulmonary circuit & contraction of left ventricle provides force to drive blood though systemic circuit,
But: not entire story:
Contraction of right ventricle provides force to drive blood through pulmonary circuit & contraction of left ventricle provides force to drive blood though systemic circuit,
But: not entire story:
During systole,
During diastole
Arterioles
You should be able to identify the following arteries, know from where each artery receives blood, and know to where each artery delivers blood.
Aorta Pulmonary trunkBrachiocephalic artery Pulmonary arteriesSubclavian arteries Common carotid arteriesAxillary arteries Internal carotid arteriesBrachial arteries External carotid arteriesRadial arteries Vertebral arteriesUlnar arteries Basilar arteryCommon iliac arteries Renal arteriesInternal iliac arteries Celiac trunkExternal iliac arteries Hepatic arteryFemoral arteries Splenic arteryPopliteal arteries Left gastric arteryAnterior tibial arteries Superior mesenteric arteriesPosterior tibial arteries Inferior mesenteric arteriesGonadal arteries Coronary arteries
Example: Each external iliac artery receives blood from the common iliac artery on that side and delivers blood to the femoral artery on that side
You should be able to identify the following veins, know from where each vein receives blood, and know to where each vein delivers blood.
Superior vena cava Hepatic portal veinInferior vena cava Splenic veinBrachiocephalic veins Inferior mesenteric veinSubclavian veins Superior mesenteric veinAxillary veins Common iliac veins Brachial veins Internal iliac veins Radial veins External iliac veins Ulnar veins Femoral veinsCephalic veins Popliteal veinsBasilic veins Anterior tibial veinsMedian cubital veins Posterior tibial veinsVertebral veins Greater saphenous veinsInternal jugular veins Lesser saphenous veinsExternal jugular veins Gonadal veins
Example: Each external iliac vein receives blood from the femoral vein on that side and delivers blood to the common iliac vein on that side