Humans do not have gizzards. Birds do have gizzards, because they do not have teeth. The gizzard’s function is to grind food in a bird's alimentary canal.Know More
A gizzard is a part of a bird’s stomach. The gizzard’s walls are thick and made up of muscle. When a bird eats, the food goes through the esophagus and into the crop (a pouch-like structure).
From the crop, food enters the first part of the stomach, called the proventriculus, and the process of digestion begins. The gizzard contains grit, sand or small stones and is the second part of a bird’s stomach. These small stones pulverize food. Interestingly, all birds have gizzards, some insects and reptiles also have them.Learn more about Human Anatomy
According to HowStuffWorks, nitrogen is important to humans and all other living organisms because it is an important component of amino acids. Humans use amino acids to build proteins that form the building blocks of many biological tissues.Full Answer >
Dictionary.com states that "thorax" indicates the part of the torso in humans or in higher vertebrates that is situated between the abdomen and the neck. The thorax, or chest, includes the cavity where the lungs and heart are located. The ribs, sternum and some vertebrae that surround the cavity.Full Answer >
The Mirror reports that humans, on average, spend a total of 227,468 hours, or 26 years, of their lives sleeping. According to the National Center on Sleep Disorders Research, this amount translates into one-third, or 33 percent, of a person's total lifetime spent sleeping.Full Answer >
Nitrogen in the form of nitrites and nitrates can cause serious health risks in humans, ranging from cancer and thyroid problems to respiratory issues and vitamin deficiencies. However, nitrogen molecules in a stable condition are essential to life. They play an important role in the genetic code and comprise up to 78 percent of Earth’s atmosphere.Full Answer >