Cardio-Respiratory System

The Right Side: [blank_start]Oxygen-poor[blank_end] blood enters the heart through the [blank_start]Vena cava[blank_end], into the [blank_start]atrium[blank_end]. It then flows into the [blank_start]ventricle[blank_end].

The pulmonary arteries pump blood to the lungs

Blood enters the lungs, where [blank_start]CO²[blank_end] diffusees into the [blank_start]lungs[blank_end] and [blank_start]O²[blank_end] diffusees into the [blank_start]blood[blank_end]

[blank_start]Oxygen-rich[blank_end] blood enters the heart through the [blank_start]Pulmonary veins[blank_end] and into the [blank_start]atrium[blank_end], where it is then pumped into the [blank_start]ventricle[blank_end]. The [blank_start]ventrical[blank_end] pumps the blood into the [blank_start]aorta[blank_end], and is circulated to [blank_start]the rest of the body[blank_end]

The left ventricle is the smallest chamber of the heart