CARDIOVASCULAR & RESPIRATORY SYSTEM

Heart, blood, & blood vessels

Left ventricls -- aorta -- arteries -- arterioles -- capillaries -- venuels -- veins -- superior & inferior vena cava -- right atrium

Right atrium -- right ventrical -- pulmonary arteries -- arterioles -- capilaries -- venuels -- veins -- pulmonary veins -- left atrium -- left ventricle

Contracts w/ most force to propel the blood through the systemic circulation

Occurs when ventricle contract

Occurs durring relaxation of the entire heart & contraction of the atria

Parasympathetic
- innervates heart & digestive system
-slows rate of heart contractions & increases digestive activity in the intestines

Located in right atrium
- paces heart contractions

Located in interatrial septa
-slower to contract creating a delay which allows atria to finish their contraction & too squeeze contents into ventricles before the ventricles begin to contract

Conductive fibers that branch out AP in ventricular walls

Elastic, stretch as they fill w/ blood
- wrapped in smooth muscle

Very small
wrapped in smotth blood

Microscopic blood vessels

- pinocytosis
- diffusion or transport through capillary cell membranes
- movement through pores in the cells called fenestrations
- movement through the space between the cells

Contains most deoxygenated blood in body