The heart is comprised of 4 chambers. The upper is called the atria (plural) and the lower are the ventricles. Blood flows into the right atrium (singular), then is pumped into the right ventricle. The right ventricle continues the flow, pumping the blood into the lungs where it receives oxygen. From there, it flows into […]
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Vital Statistics: Place of Origin: England Group: Terrier Height: 10-15 in. Weight: 14-18 lbs. Life span: 12-14 yrs. Trainability: high Good with children: yes with gentle children Good with other pets: may chase small animals What is the origin of the Jack Russell Terrier? In the 19th century, the Reverend John Russell , a British […]
