A horse has an average total of 18 thoracic vertebrae, with five located in the withers. Each thoracic vertebra is also associated with a rib. A horse also has, on average, six lumbar vertebrae. Some breeds, such as the Arabian, will sometimes, but not always, have five lumbar vertebrae and 17 thoracic vertebrae.

A horse’s spine is made up of 7 cervical vertebrae, 18 thoracic vertebrae (that connect with the ribs), 6 lumbal vertebrae, 5 sacral vertebrae (which are fused, creating the sacrum) and 16 to 18 coccygeal vertebrae.

Many Arabians have one less vertebrae in their backs, which accounts for their shorter length. Additionally, they also have one less in their tail, which is what gives them their famous high tail set. And for their ribs, they have 17 instead of 18 like other breeds of horses do.

In humans, the vertebral column usually consists of 33 vertebrae, placed in series and connected by ligaments and intervertebral discs. However, the number of vertebrae can vary between 32 and 35. Usually there are 7 cervical, 12 thoracic, 5 lumbar, 5 sacral and 4 caudal (coccygeal) vertebrae.

The average person is born with 33 individual bones (the vertebrae) that interact and connect with each other through flexible joints called facets. By the time a person becomes an adult most have only 24 vertebrae because some vertebrae at the bottom end of the spine fuse together during normal growth and development.

What Are the Muscles of the Lower Back? The quick answer to this question is the muscles of the lower back are the Multifidus, Longissimus, Spinalis, and Quadratus Lumborum. The pelvic floor muscles also help increase this pressure, which provides stability to the spine and trunk.

1. In general, disc herniations hurt both with bending forward AND with returning from bending up to an upright position. Back strains or sprains tend to hurt less with bending forward, and more with returning from a forward bend.

These are typical symptoms you might experience:

1. your back hurting more when you move, less when you stay still.
2. pain in your back radiating down into your buttocks but not typically extending into your legs.
3. muscle cramps or spasms in your back.
4. trouble walking or bending.
5. difficulty standing up straight.

Latissimus Dorsi muscles

gluteus maximus

pineal gland

The largest muscle is the gluteus maximus (buttock muscle), which moves the thighbone away from the body and straightens out the hip joint. It is also one of the stronger muscles in the body. The smallest muscle is the stapedius in the middle ear.

As it turns out, your brain isn’t actually a muscle. It’s an organ — one that actually plays a huge role in controlling muscles throughout your body. Muscle is made up of muscle tissue, which is muscle cells grouped into elastic bundles that contract together to produce motion and/or force.

(n.d.). Your brain also contains cells, nerve fibers, arteries, and arterioles. It also contains fat and is the fattiest organ in the body — nearly 60 percent fat.

Regular exercise strengthens and tones your brain just as it does your body. The benefits of your exercise program might just be in your head. Turns out that all the work you do to build a better bicep helps your brain, too.