The main organ of the respiratory system is the lungs. Other respiratory organs include the nose, the trachea and the breathing muscles (the diaphragm and the intercostal muscles).

Arteries and Veins

What are the three Differences of Arteries and Veins?
(1) Arteries carry oxygenated blood away from the heart with a downward direction to the rest of the body, while veins push deoxygenated blood back to your heart with an upward direction
(2) You can locate your arteries deeper within your body and have thick elastic muscle…[Read more]

Similarities of Arteries and Veins:
(1) Arteries and veins (also called blood vessels) are tubes of muscle that your blood flows through.
(2) Arteries and veins have walls that share a common overall structure that consists of three layers: the tunica intima, tunica media, and tunica adventitia.

(1) Arteries carry oxygenated blood away from the heart with a downward direction to the rest of the body, while veins push deoxygenated blood back to your heart with an upward direction
(2) You can locate your arteries deeper within your body and have thick elastic muscle walls. Veins have thin, non-elastic, less muscular walls, and most of them…[Read more]

Parts of the mouth include the lips, vestibule, mouth cavity, gums, teeth, hard and soft palate, tongue and salivary glands. The mouth is also known as the oral cavity or the buccal cavity.

The digestive system includes the mouth, pharynx (throat), esophagus, stomach, small intestine, large intestine, rectum, and anus.