What type of circulatory system do dogs have?

Dogs, like all mammals, have a closed circulatory system. This means that their blood is contained within a network of blood vessels and does not directly bathe the tissues.

Here's a breakdown of the key features of a closed circulatory system in dogs:

* Double Circulation: The blood passes through the heart twice in each complete circuit.

* Pulmonary Circulation: Blood travels from the heart to the lungs to pick up oxygen and release carbon dioxide, then back to the heart.

* Systemic Circulation: Oxygenated blood travels from the heart to the rest of the body, delivering oxygen and nutrients, then back to the heart.

* Four-chambered Heart: The dog's heart is divided into four chambers:

* Right atrium: Receives deoxygenated blood from the body.

* Right ventricle: Pumps deoxygenated blood to the lungs.

* Left atrium: Receives oxygenated blood from the lungs.

* Left ventricle: Pumps oxygenated blood to the body.

* Blood Vessels: The blood travels through a network of blood vessels:

* Arteries: Carry oxygenated blood away from the heart.

* Veins: Carry deoxygenated blood back to the heart.

* Capillaries: Tiny blood vessels that connect arteries and veins, allowing for gas exchange and nutrient delivery.

This efficient system allows for the rapid delivery of oxygen and nutrients throughout the body, supporting the dog's high energy levels and activity.