Final answer:
The two small bumps on the front center of the mouth are known as the lips, which are highly vascularized and contain the orbicularis oris muscle, playing crucial roles in the oral cavity for various functions.
Step-by-step explanation:
The two small bumps on the front center of the mouth are called the lips. The lips are a focal feature of the oral cavity, which also includes structures such as the cheeks, tongue, and palate. The lips themselves are rich in blood vessels and have a thin layer of keratin, giving them their characteristic red color. They are essentially a muscle-covered membrane - the orbicularis oris muscle - that regulates what enters and exits the mouth. Furthermore, the lips and the oral cavity play a vital role in various functions such as speaking, eating, and even in expressions of affection like kissing.