Circulatory and Respiratory Systems: Of Blood and Breath



No account yet? Register

Let’s compare the horse’s circulatory and respiratory systems to an engine. The food it consumes is its fuel. The respiratory system provides oxygen to facilitate metabolism, and the cardiovascular or circulatory system delivers the oxygen and nutrients to tissues and carries off waste products that are produced. Together the circulatory and respiratory systems work to fuel the horse’s body.

The flow of blood and oxygen can make the difference between a champion and an ordinary horse, or when problems develop, it can mean the difference between life and death. This free report is the 11th installment of the horse anatomy and physiology series, where we will take a close look at the equine circulatory and respiratory systems and the manner in which they function.



No account yet? Register

Written by:

Les Sellnow was a prolific freelance writer based near Riverton, Wyoming. He specialized in articles on equine research, and operated a ranch where he raised horses and livestock. He authored several fiction and nonfiction books, including Understanding Equine Lameness and Understanding The Young Horse. He died in 2023.

Related Articles

Foal sleeping in pasture
Fruitful Endeavors: Stallion Fertility
Skinny Horse Eating Hay
bumps or hives on horse's skin

Stay on top of the most recent Horse Health news with

FREE weekly newsletters from

Weekly Poll

sponsored by:

What do you think: Can pituitary pars intermedia dysfunction (PPID) be managed by medication alone?
159 votes · 159 answers

Readers' Most Popular

Sign In

Don’t have an account? Register for a FREE account here.

Need to update your account?

You need to be logged in to fill out this form

Create a free account with!